Revert "First draft of Dawn backend: clears are working."

This reverts commit 6cebea42a8cd49e8cd405bfdd59ddee081bf9d97.

Reason for revert: breaking google3 roll

Original change's description:
> First draft of Dawn backend: clears are working.
> 
> First draft of (mostly stubbed-out) GrDawnGpu.
> Skeletons of GrDawnCaps, GrDawnGpuCommandBuffer, GrDawnRenderTarget.
> First draft of DawnTestContext.
> First draft of psuedo-fences for Dawn, implemented with MapReadAsync.
> 
> Change-Id: Id009436f4441f26ffbc82d485d7af3a499b3281b
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/226857
> Commit-Queue: Stephen White <senorblanco@chromium.org>
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>

TBR=egdaniel@google.com,jvanverth@google.com,bsalomon@google.com,senorblanco@chromium.org

Change-Id: Ie494b5a403e8537c6539551533ae8b9156e90a61
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/228120
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index 72c3833..5010b05 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -649,7 +649,6 @@
 
   if (skia_use_dawn) {
     public_defines += [ "SK_DAWN" ]
-    sources += skia_dawn_sources
     public_deps += [
       "//third_party/dawn:dawn_headers",
       "//third_party/dawn:libdawn",
@@ -1566,10 +1565,6 @@
     if (skia_use_metal) {
       sources += [ "tools/gpu/mtl/MtlTestContext.mm" ]
     }
-    if (skia_use_dawn) {
-      public_deps += [ "//third_party/dawn:dawn_headers" ]
-      sources += [ "tools/gpu/dawn/DawnTestContext.cpp" ]
-    }
   }
 
   test_lib("flags") {
diff --git a/gn/gpu.gni b/gn/gpu.gni
index f7daf4c..253400c 100644
--- a/gn/gpu.gni
+++ b/gn/gpu.gni
@@ -704,19 +704,6 @@
   "$_src/gpu/vk/GrVkVertexBuffer.h",
 ]
 
-skia_dawn_sources = [
-  "$_src/gpu/dawn/GrDawnCaps.cpp",
-  "$_src/gpu/dawn/GrDawnCaps.h",
-  "$_src/gpu/dawn/GrDawnGpu.cpp",
-  "$_src/gpu/dawn/GrDawnGpu.h",
-  "$_src/gpu/dawn/GrDawnGpuCommandBuffer.cpp",
-  "$_src/gpu/dawn/GrDawnGpuCommandBuffer.h",
-  "$_src/gpu/dawn/GrDawnRenderTarget.cpp",
-  "$_src/gpu/dawn/GrDawnRenderTarget.h",
-  "$_src/gpu/dawn/GrDawnUtil.cpp",
-  "$_src/gpu/dawn/GrDawnUtil.h",
-]
-
 skia_metal_sources = [
   "$_include/gpu/mtl/GrMtlTypes.h",
   "$_src/gpu/mtl/GrMtlBuffer.h",
diff --git a/include/gpu/GrBackendSurface.h b/include/gpu/GrBackendSurface.h
index cf7543f..8573626 100644
--- a/include/gpu/GrBackendSurface.h
+++ b/include/gpu/GrBackendSurface.h
@@ -15,17 +15,9 @@
 #include "include/private/GrGLTypesPriv.h"
 #include "include/private/GrVkTypesPriv.h"
 
-#ifdef SK_DAWN
-#include "include/gpu/dawn/GrDawnTypes.h"
-#endif
-
 class GrVkImageLayout;
 class GrGLTextureParameters;
 
-#ifdef SK_DAWN
-#include "dawn/dawncpp.h"
-#endif
-
 #ifdef SK_METAL
 #include "include/gpu/mtl/GrMtlTypes.h"
 #endif
@@ -68,12 +60,6 @@
     // external format.
     static GrBackendFormat MakeVk(const GrVkYcbcrConversionInfo& ycbcrInfo);
 
-#ifdef SK_DAWN
-    static GrBackendFormat MakeDawn(dawn::TextureFormat format) {
-        return GrBackendFormat(format);
-    }
-#endif
-
 #ifdef SK_METAL
     static GrBackendFormat MakeMtl(GrMTLPixelFormat format) {
         return GrBackendFormat(format);
@@ -101,10 +87,6 @@
 
     const GrVkYcbcrConversionInfo* getVkYcbcrConversionInfo() const;
 
-#ifdef SK_DAWN
-    const dawn::TextureFormat* getDawnFormat() const;
-#endif
-
 #ifdef SK_METAL
     // If the backend API is Metal, this returns a pointer to a GrMTLPixelFormat. Otherwise
     // it returns nullptr
@@ -128,10 +110,6 @@
 
     GrBackendFormat(const VkFormat vkFormat, const GrVkYcbcrConversionInfo&);
 
-#ifdef SK_DAWN
-    GrBackendFormat(dawn::TextureFormat format);
-#endif
-
 #ifdef SK_METAL
     GrBackendFormat(const GrMTLPixelFormat mtlFormat);
 #endif
@@ -147,10 +125,6 @@
             VkFormat                 fFormat;
             GrVkYcbcrConversionInfo  fYcbcrConversionInfo;
         }                fVk;
-#ifdef SK_DAWN
-        dawn::TextureFormat fDawnFormat;
-#endif
-
 #ifdef SK_METAL
         GrMTLPixelFormat fMtlFormat;
 #endif
@@ -186,12 +160,6 @@
                      const GrMtlTextureInfo& mtlInfo);
 #endif
 
-#ifdef SK_DAWN
-    GrBackendTexture(int width,
-                     int height,
-                     const GrDawnImageInfo& dawnInfo);
-#endif
-
     GrBackendTexture(int width,
                      int height,
                      GrMipMapped,
@@ -216,12 +184,6 @@
     // externally to GrContext.
     void glTextureParametersModified();
 
-#ifdef SK_DAWN
-    // If the backend API is Dawn, copies a snapshot of the GrDawnImageInfo struct into the passed
-    // in pointer and returns true. Otherwise returns false if the backend API is not Dawn.
-    bool getDawnImageInfo(GrDawnImageInfo*) const;
-#endif
-
     // If the backend API is Vulkan, copies a snapshot of the GrVkImageInfo struct into the passed
     // in pointer and returns true. This snapshot will set the fImageLayout to the current layout
     // state. Otherwise returns false if the backend API is not Vulkan.
@@ -277,7 +239,6 @@
     friend class GrProxyProvider;
     friend class GrGpu;
     friend class GrGLGpu;
-    friend class GrDawnGpu;
     friend class GrVkGpu;
     friend class GrMtlGpu;
     friend class PromiseImageHelper;
@@ -325,9 +286,6 @@
 #ifdef SK_METAL
     GrMtlTextureInfo fMtlInfo;
 #endif
-#ifdef SK_DAWN
-    GrDawnImageInfo  fDawnInfo;
-#endif
 };
 
 class SK_API GrBackendRenderTarget {
@@ -342,14 +300,6 @@
                           int stencilBits,
                           const GrGLFramebufferInfo& glInfo);
 
-#ifdef SK_DAWN
-    GrBackendRenderTarget(int width,
-                          int height,
-                          int sampleCnt,
-                          int stencilBits,
-                          const GrDawnImageInfo& dawnInfo);
-#endif
-
     /** Deprecated, use version that does not take stencil bits. */
     GrBackendRenderTarget(int width,
                           int height,
@@ -391,12 +341,6 @@
     // in pointer and returns true. Otherwise returns false if the backend API is not GL.
     bool getGLFramebufferInfo(GrGLFramebufferInfo*) const;
 
-#ifdef SK_DAWN
-    // If the backend API is Dawn, copies a snapshot of the GrDawnImageInfo struct into the passed
-    // in pointer and returns true. Otherwise returns false if the backend API is not Dawn.
-    bool getDawnImageInfo(GrDawnImageInfo*) const;
-#endif
-
     // If the backend API is Vulkan, copies a snapshot of the GrVkImageInfo struct into the passed
     // in pointer and returns true. This snapshot will set the fImageLayout to the current layout
     // state. Otherwise returns false if the backend API is not Vulkan.
@@ -443,7 +387,6 @@
     friend class SkImage_Gpu;
     friend class GrGpu;
     friend class GrGLGpu;
-    friend class GrDawnGpu;
     friend class GrProxyProvider;
     friend class GrVkGpu;
     friend class GrMtlGpu;
@@ -480,9 +423,6 @@
 #ifdef SK_METAL
     GrMtlTextureInfo fMtlInfo;
 #endif
-#ifdef SK_DAWN
-    GrDawnImageInfo  fDawnInfo;
-#endif
 };
 
 #endif
diff --git a/include/gpu/GrContext.h b/include/gpu/GrContext.h
index 7556ff2..069b071 100644
--- a/include/gpu/GrContext.h
+++ b/include/gpu/GrContext.h
@@ -70,11 +70,6 @@
     static sk_sp<GrContext> MakeMetal(void* device, void* queue);
 #endif
 
-#ifdef SK_DAWN
-    static sk_sp<GrContext> MakeDawn(const dawn::Device& device, const GrContextOptions& options);
-    static sk_sp<GrContext> MakeDawn(const dawn::Device& device);
-#endif
-
     static sk_sp<GrContext> MakeMock(const GrMockOptions*, const GrContextOptions&);
     static sk_sp<GrContext> MakeMock(const GrMockOptions*);
 
diff --git a/include/gpu/GrTypes.h b/include/gpu/GrTypes.h
index 679a0fa..e56347d 100644
--- a/include/gpu/GrTypes.h
+++ b/include/gpu/GrTypes.h
@@ -182,7 +182,6 @@
  */
 enum class GrBackendApi : unsigned {
     kMetal,
-    kDawn,
     kOpenGL,
     kVulkan,
     /**
diff --git a/include/gpu/dawn/GrDawnTypes.h b/include/gpu/dawn/GrDawnTypes.h
deleted file mode 100644
index f8936c2..0000000
--- a/include/gpu/dawn/GrDawnTypes.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrDawnTypes_DEFINED
-#define GrDawnTypes_DEFINED
-
-#ifdef Always
-#undef Always
-#endif
-#include "dawn/dawncpp.h"
-
-struct GrDawnImageInfo {
-    dawn::Texture       fTexture;
-    dawn::TextureFormat fFormat;
-    uint32_t            fLevelCount;
-    GrDawnImageInfo() : fTexture(nullptr), fFormat(), fLevelCount(0) {
-    }
-    GrDawnImageInfo(const GrDawnImageInfo& other)
-        : fTexture(other.fTexture)
-        , fFormat(other.fFormat)
-        , fLevelCount(other.fLevelCount) {
-    }
-    GrDawnImageInfo& operator=(const GrDawnImageInfo& other) {
-        fTexture = other.fTexture;
-        fFormat = other.fFormat;
-        fLevelCount = other.fLevelCount;
-        return *this;
-    }
-    bool operator==(const GrDawnImageInfo& other) const {
-        return fTexture.Get() == other.fTexture.Get() &&
-               fFormat == other.fFormat &&
-               fLevelCount == other.fLevelCount;
-    }
-};
-
-#endif
diff --git a/src/gpu/GrBackendSurface.cpp b/src/gpu/GrBackendSurface.cpp
index 77a5617..8b3e2f1 100644
--- a/src/gpu/GrBackendSurface.cpp
+++ b/src/gpu/GrBackendSurface.cpp
@@ -10,11 +10,6 @@
 
 #include "src/gpu/gl/GrGLUtil.h"
 
-#ifdef SK_DAWN
-#include "include/gpu/dawn/GrDawnTypes.h"
-#include "src/gpu/dawn/GrDawnUtil.h"
-#endif
-
 #ifdef SK_VULKAN
 #include "include/gpu/vk/GrVkTypes.h"
 #include "src/gpu/vk/GrVkImageLayout.h"
@@ -49,11 +44,6 @@
             fMtlFormat = that.fMtlFormat;
             break;
 #endif
-#ifdef SK_DAWN
-        case GrBackendApi::kDawn:
-            fDawnFormat = that.fDawnFormat;
-            break;
-#endif
         case GrBackendApi::kMock:
             fMockColorType = that.fMockColorType;
             break;
@@ -148,22 +138,6 @@
     return nullptr;
 }
 
-#ifdef SK_DAWN
-GrBackendFormat::GrBackendFormat(dawn::TextureFormat format)
-        : fBackend(GrBackendApi::kDawn)
-        , fValid(true)
-        , fDawnFormat(format)
-        , fTextureType(GrTextureType::k2D) {
-}
-
-const dawn::TextureFormat* GrBackendFormat::getDawnFormat() const {
-    if (this->isValid() && GrBackendApi::kDawn == fBackend) {
-        return &fDawnFormat;
-    }
-    return nullptr;
-}
-#endif
-
 #ifdef SK_METAL
 GrBackendFormat::GrBackendFormat(GrMTLPixelFormat mtlFormat)
         : fBackend(GrBackendApi::kMetal)
@@ -233,11 +207,6 @@
             return fMtlFormat == that.fMtlFormat;
 #endif
             break;
-        case GrBackendApi::kDawn:
-#ifdef SK_DAWN
-            return fDawnFormat == that.fDawnFormat;
-#endif
-            break;
         case GrBackendApi::kMock:
             return fMockColorType == that.fMockColorType;
         default:
@@ -246,19 +215,6 @@
     return false;
 }
 
-#ifdef SK_DAWN
-GrBackendTexture::GrBackendTexture(int width,
-                                   int height,
-                                   const GrDawnImageInfo& dawnInfo)
-        : fIsValid(true)
-        , fWidth(width)
-        , fHeight(height)
-        , fConfig(GrDawnFormatToPixelConfig(dawnInfo.fFormat))
-        , fMipMapped(GrMipMapped(dawnInfo.fLevelCount > 1))
-        , fBackend(GrBackendApi::kDawn)
-        , fDawnInfo(dawnInfo) {}
-#endif
-
 GrBackendTexture::GrBackendTexture(int width,
                                    int height,
                                    const GrVkImageInfo& vkInfo)
@@ -401,11 +357,6 @@
             fMtlInfo = that.fMtlInfo;
             break;
 #endif
-#ifdef SK_DAWN
-        case GrBackendApi::kDawn:
-            fDawnInfo = that.fDawnInfo;
-            break;
-#endif
         case GrBackendApi::kMock:
             fMockInfo = that.fMockInfo;
             break;
@@ -416,16 +367,6 @@
     return *this;
 }
 
-#ifdef SK_DAWN
-bool GrBackendTexture::getDawnImageInfo(GrDawnImageInfo* outInfo) const {
-    if (this->isValid() && GrBackendApi::kDawn == fBackend) {
-        *outInfo = fDawnInfo;
-        return true;
-    }
-    return false;
-}
-#endif
-
 bool GrBackendTexture::getVkImageInfo(GrVkImageInfo* outInfo) const {
 #ifdef SK_VULKAN
     if (this->isValid() && GrBackendApi::kVulkan == fBackend) {
@@ -543,11 +484,6 @@
             return GrBackendFormat::MakeVk(info.fFormat);
         }
 #endif
-#ifdef SK_DAWN
-        case GrBackendApi::kDawn: {
-            return GrBackendFormat::MakeDawn(fDawnInfo.fFormat);
-        }
-#endif
 #ifdef SK_METAL
         case GrBackendApi::kMetal: {
             GrMtlTextureInfo mtlInfo;
@@ -591,10 +527,6 @@
         case GrBackendApi::kMetal:
             return t0.fMtlInfo == t1.fMtlInfo;
 #endif
-#ifdef SK_DAWN
-        case GrBackendApi::kDawn:
-            return t0.fDawnInfo == t1.fDawnInfo;
-#endif
         default:
             return false;
     }
@@ -603,22 +535,6 @@
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
-#ifdef SK_DAWN
-GrBackendRenderTarget::GrBackendRenderTarget(int width,
-                                             int height,
-                                             int sampleCnt,
-                                             int stencilBits,
-                                             const GrDawnImageInfo& dawnInfo)
-        : fIsValid(true)
-        , fWidth(width)
-        , fHeight(height)
-        , fSampleCnt(sampleCnt)
-        , fStencilBits(stencilBits)
-        , fConfig(GrDawnFormatToPixelConfig(dawnInfo.fFormat))
-        , fBackend(GrBackendApi::kDawn)
-        , fDawnInfo(dawnInfo) {}
-#endif
-
 GrBackendRenderTarget::GrBackendRenderTarget(int width,
                                              int height,
                                              int sampleCnt,
@@ -754,11 +670,6 @@
             fVkInfo.assign(that.fVkInfo, this->isValid());
 #endif
             break;
-#ifdef SK_DAWN
-        case GrBackendApi::kDawn:
-            fDawnInfo = that.fDawnInfo;
-            break;
-#endif
 #ifdef SK_METAL
         case GrBackendApi::kMetal:
             fMtlInfo = that.fMtlInfo;
@@ -774,16 +685,6 @@
     return *this;
 }
 
-#ifdef SK_DAWN
-bool GrBackendRenderTarget::getDawnImageInfo(GrDawnImageInfo* outInfo) const {
-    if (this->isValid() && GrBackendApi::kDawn == fBackend) {
-        *outInfo = fDawnInfo;
-        return true;
-    }
-    return false;
-}
-#endif
-
 bool GrBackendRenderTarget::getVkImageInfo(GrVkImageInfo* outInfo) const {
 #ifdef SK_VULKAN
     if (this->isValid() && GrBackendApi::kVulkan == fBackend) {
@@ -901,10 +802,6 @@
         case GrBackendApi::kMetal:
             return r0.fMtlInfo == r1.fMtlInfo;
 #endif
-#ifdef SK_DAWN
-        case GrBackendApi::kDawn:
-            return r0.fDawnInfo == r1.fDawnInfo;
-#endif
         default:
             return false;
     }
diff --git a/src/gpu/GrContextPriv.cpp b/src/gpu/GrContextPriv.cpp
index 14795d2..ad6d8ab 100644
--- a/src/gpu/GrContextPriv.cpp
+++ b/src/gpu/GrContextPriv.cpp
@@ -231,16 +231,14 @@
 
     static const char* kBackendStr[] = {
         "Metal",
-        "Dawn",
         "OpenGL",
         "Vulkan",
         "Mock",
     };
     GR_STATIC_ASSERT(0 == (unsigned)GrBackendApi::kMetal);
-    GR_STATIC_ASSERT(1 == (unsigned)GrBackendApi::kDawn);
-    GR_STATIC_ASSERT(2 == (unsigned)GrBackendApi::kOpenGL);
-    GR_STATIC_ASSERT(3 == (unsigned)GrBackendApi::kVulkan);
-    GR_STATIC_ASSERT(4 == (unsigned)GrBackendApi::kMock);
+    GR_STATIC_ASSERT(1 == (unsigned)GrBackendApi::kOpenGL);
+    GR_STATIC_ASSERT(2 == (unsigned)GrBackendApi::kVulkan);
+    GR_STATIC_ASSERT(3 == (unsigned)GrBackendApi::kMock);
     writer.appendString("backend", kBackendStr[(unsigned)fContext->backend()]);
 
     writer.appendName("caps");
diff --git a/src/gpu/GrLegacyDirectContext.cpp b/src/gpu/GrLegacyDirectContext.cpp
index b6bfd12..4c3f756 100644
--- a/src/gpu/GrLegacyDirectContext.cpp
+++ b/src/gpu/GrLegacyDirectContext.cpp
@@ -23,9 +23,6 @@
 #ifdef SK_VULKAN
 #include "src/gpu/vk/GrVkGpu.h"
 #endif
-#ifdef SK_DAWN
-#include "dawn/GrDawnGpu.h"
-#endif
 
 #ifdef SK_DISABLE_REDUCE_OPLIST_SPLITTING
 static const bool kDefaultReduceOpListSplitting = false;
@@ -221,23 +218,3 @@
 }
 #endif
 
-#ifdef SK_DAWN
-sk_sp<GrContext> GrContext::MakeDawn(const dawn::Device& device) {
-    GrContextOptions defaultOptions;
-    return MakeDawn(device, defaultOptions);
-}
-
-sk_sp<GrContext> GrContext::MakeDawn(const dawn::Device& device, const GrContextOptions& options) {
-    sk_sp<GrContext> context(new GrLegacyDirectContext(GrBackendApi::kDawn, options));
-
-    context->fGpu = GrDawnGpu::Make(device, options, context.get());
-    if (!context->fGpu) {
-        return nullptr;
-    }
-
-    if (!context->init(context->fGpu->refCaps(), nullptr)) {
-        return nullptr;
-    }
-    return context;
-}
-#endif
diff --git a/src/gpu/dawn/GrDawnCaps.cpp b/src/gpu/dawn/GrDawnCaps.cpp
deleted file mode 100644
index 3fb9a55..0000000
--- a/src/gpu/dawn/GrDawnCaps.cpp
+++ /dev/null
@@ -1,179 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "GrDawnCaps.h"
-
-GrDawnCaps::GrDawnCaps(const GrContextOptions& contextOptions) : INHERITED(contextOptions) {
-    fBufferMapThreshold = SK_MaxS32;  // FIXME: get this from Dawn?
-    fShaderCaps.reset(new GrShaderCaps(contextOptions));
-    fMaxTextureSize = 2048;
-    fPerformPartialClearsAsDraws = true;
-}
-
-bool GrDawnCaps::isFormatSRGB(const GrBackendFormat& format) const {
-    return false;
-}
-
-bool GrDawnCaps::isConfigTexturable(GrPixelConfig config) const {
-    switch (config) {
-        case kRGBA_8888_GrPixelConfig:
-        case kBGRA_8888_GrPixelConfig:
-        case kAlpha_8_GrPixelConfig:
-            return true;
-        default:
-            return false;
-    }
-}
-
-GrPixelConfig GrDawnCaps::onGetConfigFromBackendFormat(const GrBackendFormat& format,
-                                                     GrColorType colorType) const {
-    dawn::TextureFormat textureFormat = *format.getDawnFormat();
-    switch (colorType) {
-        case GrColorType::kUnknown:
-            return kUnknown_GrPixelConfig;
-        case GrColorType::kAlpha_8:
-            if (dawn::TextureFormat::R8Unorm == textureFormat) {
-                return kAlpha_8_as_Red_GrPixelConfig;
-            }
-            break;
-        case GrColorType::kRGBA_8888:
-            if (dawn::TextureFormat::R8G8B8A8Unorm == textureFormat) {
-                return kRGBA_8888_GrPixelConfig;
-            }
-            break;
-        case GrColorType::kRGB_888x:
-            break;
-        case GrColorType::kBGRA_8888:
-            if (dawn::TextureFormat::B8G8R8A8Unorm == textureFormat) {
-                return kBGRA_8888_GrPixelConfig;
-            }
-            break;
-        default:
-            break;
-    }
-    return kUnknown_GrPixelConfig;
-}
-
-GrPixelConfig GrDawnCaps::getYUVAConfigFromBackendFormat(const GrBackendFormat& backendFormat)
-        const {
-    const dawn::TextureFormat* format = backendFormat.getDawnFormat();
-    if (!format) {
-        return kUnknown_GrPixelConfig;
-    }
-    switch (*format) {
-        case dawn::TextureFormat::R8Unorm:
-            return kAlpha_8_as_Red_GrPixelConfig;
-            break;
-        case dawn::TextureFormat::R8G8B8A8Unorm:
-            return kRGBA_8888_GrPixelConfig;
-            break;
-        case dawn::TextureFormat::B8G8R8A8Unorm:
-            return kBGRA_8888_GrPixelConfig;
-            break;
-        default:
-            return kUnknown_GrPixelConfig;
-            break;
-    }
-}
-
-size_t GrDawnCaps::onTransferFromOffsetAlignment(GrColorType bufferColorType) const {
-    if (bufferColorType == GrColorType::kRGB_888x) {
-        return false;
-    }
-    size_t bpp = GrColorTypeBytesPerPixel(bufferColorType);
-    switch (bpp & 0b11) {
-        case 0:     return bpp;
-        case 2:     return 2 * bpp;
-        default:    return 4 * bpp;
-    }
-}
-
-static GrSwizzle get_swizzle(const GrBackendFormat& format, GrColorType colorType,
-                             bool forOutput) {
-    SkASSERT(format.getDawnFormat());
-
-    switch (colorType) {
-        case GrColorType::kAlpha_8: // fall through
-        case GrColorType::kAlpha_F16:
-            if (forOutput) {
-                return GrSwizzle::AAAA();
-            } else {
-                return GrSwizzle::RRRR();
-            }
-        case GrColorType::kGray_8:
-            if (!forOutput) {
-                return GrSwizzle::RRRA();
-            }
-            break;
-        case GrColorType::kRGB_888x:
-            if (!forOutput) {
-                return GrSwizzle::RGB1();
-            }
-        default:
-            return GrSwizzle::RGBA();
-    }
-    return GrSwizzle::RGBA();
-}
-
-bool GrDawnCaps::isFormatTexturable(GrColorType ct, const GrBackendFormat& format) const {
-    GrPixelConfig config = this->getConfigFromBackendFormat(format, ct);
-    if (kUnknown_GrPixelConfig == config) {
-        return false;
-    }
-
-    return this->isConfigTexturable(config);
-}
-
-bool GrDawnCaps::isFormatCopyable(GrColorType ct, const GrBackendFormat& format) const {
-    return true;
-}
-
-int GrDawnCaps::getRenderTargetSampleCount(int requestedCount, GrColorType ct,
-                                           const GrBackendFormat& format) const {
-    GrPixelConfig config = this->getConfigFromBackendFormat(format, ct);
-    if (kUnknown_GrPixelConfig == config) {
-        return 0;
-    }
-
-    return this->getRenderTargetSampleCount(requestedCount, config);
-}
-
-GrBackendFormat GrDawnCaps::getBackendFormatFromColorType(GrColorType ct) const {
-    GrPixelConfig config = GrColorTypeToPixelConfig(ct);
-    if (config == kUnknown_GrPixelConfig) {
-        return GrBackendFormat();
-    }
-    dawn::TextureFormat format;
-    if (!GrPixelConfigToDawnFormat(config, &format)) {
-        return GrBackendFormat();
-    }
-    return GrBackendFormat::MakeDawn(format);
-}
-
-GrBackendFormat GrDawnCaps::getBackendFormatFromCompressionType(SkImage::CompressionType type) const
-{
-    return GrBackendFormat();
-}
-
-GrSwizzle GrDawnCaps::getTextureSwizzle(const GrBackendFormat& format, GrColorType colorType) const
-{
-    return get_swizzle(format, colorType, false);
-}
-
-bool GrDawnCaps::canClearTextureOnCreation() const {
-    return true;
-}
-
-GrSwizzle GrDawnCaps::getOutputSwizzle(const GrBackendFormat& format, GrColorType colorType) const
-{
-    return get_swizzle(format, colorType, true);
-}
-
-bool GrDawnCaps::onAreColorTypeAndFormatCompatible(GrColorType ct,
-                                                   const GrBackendFormat& format) const {
-    return true;
-}
diff --git a/src/gpu/dawn/GrDawnCaps.h b/src/gpu/dawn/GrDawnCaps.h
deleted file mode 100644
index a28eae0..0000000
--- a/src/gpu/dawn/GrDawnCaps.h
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrDawnCaps_DEFINED
-#define GrDawnCaps_DEFINED
-
-#include "src/gpu/GrCaps.h"
-#include "include/gpu/GrContextOptions.h"
-#include "src/gpu/dawn/GrDawnUtil.h"
-#include "include/gpu/GrBackendSurface.h"
-
-class GrDawnCaps : public GrCaps {
-public:
-    GrDawnCaps(const GrContextOptions& contextOptions);
-
-    bool isFormatSRGB(const GrBackendFormat& format) const override;
-    bool isFormatTexturable(GrColorType, const GrBackendFormat& format) const override;
-    bool isFormatCopyable(GrColorType, const GrBackendFormat& format) const override;
-
-    bool isConfigTexturable(GrPixelConfig config) const override;
-
-    bool isConfigCopyable(GrPixelConfig config) const override {
-        return true;
-    }
-
-    bool onCanCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
-                          const SkIRect& srcRect, const SkIPoint& dstPoint) const override {
-        return true;
-    }
-
-    bool initDescForDstCopy(const GrRenderTargetProxy* src, GrSurfaceDesc* desc,
-                            bool* rectsMustMatch, bool* disallowSubrect) const override {
-        return false;
-    }
-
-    GrPixelConfig validateBackendRenderTarget(const GrBackendRenderTarget&, GrColorType) const
-                                                                                         override {
-        return GrPixelConfig::kUnknown_GrPixelConfig;
-    }
-
-    GrPixelConfig onGetConfigFromBackendFormat(const GrBackendFormat&, GrColorType) const override;
-
-    GrPixelConfig getYUVAConfigFromBackendFormat(const GrBackendFormat&) const override;
-
-    SurfaceReadPixelsSupport surfaceSupportsReadPixels(const GrSurface*) const override {
-        return SurfaceReadPixelsSupport::kSupported;
-    }
-
-    bool onSurfaceSupportsWritePixels(const GrSurface* surface) const override {
-        return true;
-    }
-
-    int getRenderTargetSampleCount(int requestedCount, GrColorType,
-                                   const GrBackendFormat&) const override;
-
-    int getRenderTargetSampleCount(int requestedCount, GrPixelConfig config) const override {
-        return this->isConfigTexturable(config) ? 1 : 0;
-    }
-
-    int maxRenderTargetSampleCount(GrColorType ct,
-                                   const GrBackendFormat& format) const override {
-        return this->maxRenderTargetSampleCount(this->getConfigFromBackendFormat(format, ct));
-    }
-
-    int maxRenderTargetSampleCount(GrPixelConfig config) const override {
-        return this->isConfigTexturable(config) ? 1 : 0;
-    }
-
-    GrBackendFormat getBackendFormatFromColorType(GrColorType ct) const override;
-
-    GrBackendFormat getBackendFormatFromCompressionType(SkImage::CompressionType) const override;
-
-    bool canClearTextureOnCreation() const override;
-
-    GrSwizzle getTextureSwizzle(const GrBackendFormat&, GrColorType) const override;
-
-    GrSwizzle getOutputSwizzle(const GrBackendFormat&, GrColorType) const override;
-
-    size_t onTransferFromOffsetAlignment(GrColorType bufferColorType) const override;
-
-    bool onAreColorTypeAndFormatCompatible(GrColorType, const GrBackendFormat&) const override;
-
-    typedef GrCaps INHERITED;
-};
-
-#endif
diff --git a/src/gpu/dawn/GrDawnGpu.cpp b/src/gpu/dawn/GrDawnGpu.cpp
deleted file mode 100644
index b3d4a97..0000000
--- a/src/gpu/dawn/GrDawnGpu.cpp
+++ /dev/null
@@ -1,258 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "GrDawnGpu.h"
-
-#include "include/gpu/GrBackendSemaphore.h"
-#include "include/gpu/GrBackendSurface.h"
-#include "include/gpu/GrContextOptions.h"
-#include "src/gpu/GrGeometryProcessor.h"
-#include "src/gpu/GrGpuResourceCacheAccess.h"
-#include "src/gpu/GrMesh.h"
-#include "src/gpu/dawn/GrDawnCaps.h"
-#include "src/gpu/dawn/GrDawnRenderTarget.h"
-#include "src/gpu/dawn/GrDawnGpuCommandBuffer.h"
-#include "src/gpu/GrPipeline.h"
-#include "src/gpu/GrRenderTargetPriv.h"
-#include "src/gpu/GrSemaphore.h"
-#include "src/gpu/GrTexturePriv.h"
-
-#include "src/sksl/SkSLCompiler.h"
-
-#if !defined(SK_BUILD_FOR_WIN)
-#include <unistd.h>
-#endif // !defined(SK_BUILD_FOR_WIN)
-
-sk_sp<GrGpu> GrDawnGpu::Make(const dawn::Device& device,
-                             const GrContextOptions& options, GrContext* context) {
-    if (!device) {
-        return nullptr;
-    }
-
-    return sk_sp<GrGpu>(new GrDawnGpu(context, options, device));
-}
-
-////////////////////////////////////////////////////////////////////////////////
-
-GrDawnGpu::GrDawnGpu(GrContext* context, const GrContextOptions& options,
-                   const dawn::Device& device)
-        : INHERITED(context)
-        , fDevice(device)
-        , fQueue(device.CreateQueue())
-        , fCompiler(new SkSL::Compiler()) {
-    fCaps.reset(new GrDawnCaps(options));
-}
-
-GrDawnGpu::~GrDawnGpu() {
-}
-
-
-void GrDawnGpu::disconnect(DisconnectType type) {
-    INHERITED::disconnect(type);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-GrGpuRTCommandBuffer* GrDawnGpu::getCommandBuffer(
-            GrRenderTarget* rt, GrSurfaceOrigin origin, const SkRect& bounds,
-            const GrGpuRTCommandBuffer::LoadAndStoreInfo& colorInfo,
-            const GrGpuRTCommandBuffer::StencilLoadAndStoreInfo& stencilInfo) {
-    fCachedRTCommandBuffer.reset(
-        new GrDawnGpuRTCommandBuffer(this, rt, origin, colorInfo, stencilInfo));
-    return fCachedRTCommandBuffer.get();
-}
-
-GrGpuTextureCommandBuffer* GrDawnGpu::getCommandBuffer(GrTexture* texture,
-                                                       GrSurfaceOrigin origin) {
-    return nullptr;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-sk_sp<GrGpuBuffer> GrDawnGpu::onCreateBuffer(size_t size, GrGpuBufferType type,
-                                             GrAccessPattern accessPattern, const void* data) {
-    return nullptr;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-bool GrDawnGpu::onWritePixels(GrSurface* surface,
-                              int left, int top, int width, int height,
-                              GrColorType colorType,
-                              const GrMipLevel texels[], int mipLevelCount) {
-    return false;
-}
-
-bool GrDawnGpu::onTransferPixelsTo(GrTexture* texture,
-                                  int left, int top, int width, int height,
-                                  GrColorType colorType, GrGpuBuffer* transferBuffer,
-                                  size_t bufferOffset, size_t rowBytes) {
-    return false;
-}
-
-bool GrDawnGpu::onTransferPixelsFrom(GrSurface* surface, int left, int top, int width, int height,
-                                     GrColorType, GrGpuBuffer* transferBuffer, size_t offset) {
-    return false;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-sk_sp<GrTexture> GrDawnGpu::onCreateTexture(const GrSurfaceDesc& desc, SkBudgeted budgeted,
-                                            const GrMipLevel texels[], int mipLevelCount) {
-    return nullptr;
-}
-
-sk_sp<GrTexture> GrDawnGpu::onCreateCompressedTexture(int width, int height,
-                                                      SkImage::CompressionType, SkBudgeted,
-                                                      const void* data) {
-    return nullptr;
-}
-
-sk_sp<GrTexture> GrDawnGpu::onWrapBackendTexture(const GrBackendTexture& backendTex,
-                                                 GrWrapOwnership ownership,
-                                                 GrWrapCacheable cacheable,
-                                                 GrIOType) {
-    return nullptr;
-}
-
-sk_sp<GrTexture> GrDawnGpu::onWrapRenderableBackendTexture(const GrBackendTexture& tex,
-                                                           int sampleCnt, GrColorType,
-                                                           GrWrapOwnership,
-                                                           GrWrapCacheable cacheable) {
-    return nullptr;
-}
-
-sk_sp<GrRenderTarget> GrDawnGpu::onWrapBackendRenderTarget(const GrBackendRenderTarget&) {
-    return nullptr;
-}
-
-sk_sp<GrRenderTarget> GrDawnGpu::onWrapBackendTextureAsRenderTarget(const GrBackendTexture& tex,
-                                                                    int sampleCnt) {
-    GrDawnImageInfo info;
-    if (!tex.getDawnImageInfo(&info)) {
-        return nullptr;
-    }
-    if (!info.fTexture) {
-        return nullptr;
-    }
-
-    GrSurfaceDesc desc;
-    desc.fFlags = kRenderTarget_GrSurfaceFlag;
-    desc.fWidth = tex.width();
-    desc.fHeight = tex.height();
-    desc.fConfig = tex.config();
-    desc.fSampleCnt = this->caps()->getRenderTargetSampleCount(sampleCnt, tex.config());
-    if (desc.fSampleCnt < 1) {
-        return nullptr;
-    }
-
-    sk_sp<GrDawnRenderTarget> tgt = GrDawnRenderTarget::MakeWrapped(this, desc, info);
-    return tgt;
-}
-
-GrStencilAttachment* GrDawnGpu::createStencilAttachmentForRenderTarget(const GrRenderTarget* rt,
-                                                                       int width,
-                                                                       int height,
-                                                                       int numStencilSamples) {
-    return nullptr;
-}
-
-GrBackendTexture GrDawnGpu::createBackendTexture(int width, int height,
-                                                 const GrBackendFormat& format,
-                                                 GrMipMapped mipMapped,
-                                                 GrRenderable renderable,
-                                                 const void* pixels,
-                                                 size_t rowBytes,
-                                                 const SkColor4f* color,
-                                                 GrProtected isProtected) {
-    return GrBackendTexture();
-}
-
-void GrDawnGpu::deleteBackendTexture(const GrBackendTexture& tex) {
-}
-
-#if GR_TEST_UTILS
-bool GrDawnGpu::isTestingOnlyBackendTexture(const GrBackendTexture& tex) const {
-    return false;
-}
-
-GrBackendRenderTarget GrDawnGpu::createTestingOnlyBackendRenderTarget(int w, int h, GrColorType) {
-    return GrBackendRenderTarget();
-}
-
-void GrDawnGpu::deleteTestingOnlyBackendRenderTarget(const GrBackendRenderTarget&) {
-}
-
-void GrDawnGpu::testingOnly_flushGpuAndSync() {
-}
-
-#endif
-
-void GrDawnGpu::onFinishFlush(GrSurfaceProxy*[], int n, SkSurface::BackendSurfaceAccess access,
-                              const GrFlushInfo& info, const GrPrepareForExternalIORequests&) {
-}
-
-bool GrDawnGpu::onCopySurface(GrSurface* dst,
-                              GrSurface* src,
-                              const SkIRect& srcRect,
-                              const SkIPoint& dstPoint,
-                              bool canDiscardOutsideDstRect) {
-    return false;
-}
-
-bool GrDawnGpu::onReadPixels(GrSurface* surface,
-                             int left, int top, int width, int height,
-                             GrColorType colorType,
-                             void* buffer,
-                             size_t rowBytes) {
-    return false;
-}
-
-bool GrDawnGpu::onRegenerateMipMapLevels(GrTexture*) {
-    return false;
-}
-
-void GrDawnGpu::submit(GrGpuCommandBuffer* buffer) {
-    if (auto buf = static_cast<GrDawnGpuRTCommandBuffer*>(buffer->asRTCommandBuffer())) {
-        buf->submit();
-    }
-}
-
-GrFence SK_WARN_UNUSED_RESULT GrDawnGpu::insertFence() {
-    return GrFence();
-}
-
-bool GrDawnGpu::waitFence(GrFence fence, uint64_t timeout) {
-    return false;
-}
-
-void GrDawnGpu::deleteFence(GrFence fence) const {
-}
-
-sk_sp<GrSemaphore> SK_WARN_UNUSED_RESULT GrDawnGpu::makeSemaphore(bool isOwned) {
-    return nullptr;
-}
-
-sk_sp<GrSemaphore> GrDawnGpu::wrapBackendSemaphore(const GrBackendSemaphore& semaphore,
-                                                   GrResourceProvider::SemaphoreWrapType wrapType,
-                                                   GrWrapOwnership ownership) {
-    SkASSERT(!"unimplemented");
-    return nullptr;
-}
-
-void GrDawnGpu::insertSemaphore(sk_sp<GrSemaphore> semaphore) {
-    SkASSERT(!"unimplemented");
-}
-
-void GrDawnGpu::waitSemaphore(sk_sp<GrSemaphore> semaphore) {
-    SkASSERT(!"unimplemented");
-}
-
-void GrDawnGpu::checkFinishProcs() {
-    SkASSERT(!"unimplemented");
-}
-
-sk_sp<GrSemaphore> GrDawnGpu::prepareTextureForCrossContextUsage(GrTexture* texture) {
-    return nullptr;
-}
diff --git a/src/gpu/dawn/GrDawnGpu.h b/src/gpu/dawn/GrDawnGpu.h
deleted file mode 100644
index e3c428f..0000000
--- a/src/gpu/dawn/GrDawnGpu.h
+++ /dev/null
@@ -1,147 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrDawnGpu_DEFINED
-#define GrDawnGpu_DEFINED
-
-#include "src/gpu/GrGpu.h"
-#include "dawn/dawncpp.h"
-
-class GrPipeline;
-class GrDawnGpuRTCommandBuffer;
-
-namespace SkSL {
-    class Compiler;
-}
-
-class GrDawnGpu : public GrGpu {
-public:
-    static sk_sp<GrGpu> Make(const dawn::Device& device, const GrContextOptions&, GrContext*);
-    GrDawnGpu(GrContext* context, const GrContextOptions& options, const dawn::Device& device);
-
-    ~GrDawnGpu() override;
-
-    void disconnect(DisconnectType) override;
-
-    const dawn::Device& device() const { return fDevice; }
-    const dawn::Queue&  queue() const { return fQueue; }
-
-    void xferBarrier(GrRenderTarget*, GrXferBarrierType) override {}
-
-    GrBackendTexture createBackendTexture(int w, int h,
-                                          const GrBackendFormat &,
-                                          GrMipMapped,
-                                          GrRenderable,
-                                          const void* pixels,
-                                          size_t rowBytes,
-                                          const SkColor4f* color,
-                                          GrProtected isProtected) override;
-    void deleteBackendTexture(const GrBackendTexture&) override;
-#if GR_TEST_UTILS
-    bool isTestingOnlyBackendTexture(const GrBackendTexture&) const override;
-
-    GrBackendRenderTarget createTestingOnlyBackendRenderTarget(int w, int h, GrColorType) override;
-    void deleteTestingOnlyBackendRenderTarget(const GrBackendRenderTarget&) override;
-
-    void testingOnly_flushGpuAndSync() override;
-#endif
-
-    GrStencilAttachment* createStencilAttachmentForRenderTarget(const GrRenderTarget*,
-                                                                int width,
-                                                                int height,
-                                                                int numStencilSamples) override;
-
-    GrGpuRTCommandBuffer* getCommandBuffer(
-            GrRenderTarget*, GrSurfaceOrigin, const SkRect& bounds,
-            const GrGpuRTCommandBuffer::LoadAndStoreInfo&,
-            const GrGpuRTCommandBuffer::StencilLoadAndStoreInfo&) override;
-
-    GrGpuTextureCommandBuffer* getCommandBuffer(GrTexture*, GrSurfaceOrigin) override;
-
-    SkSL::Compiler* shaderCompiler() const {
-        return fCompiler.get();
-    }
-
-    void submit(GrGpuCommandBuffer* cb) override;
-    GrFence SK_WARN_UNUSED_RESULT insertFence() override;
-    bool waitFence(GrFence, uint64_t timeout) override;
-    void deleteFence(GrFence) const override;
-
-    sk_sp<GrSemaphore> SK_WARN_UNUSED_RESULT makeSemaphore(bool isOwned = true) override;
-    sk_sp<GrSemaphore> wrapBackendSemaphore(const GrBackendSemaphore& semaphore,
-                                            GrResourceProvider::SemaphoreWrapType wrapType,
-                                            GrWrapOwnership ownership) override;
-    void insertSemaphore(sk_sp<GrSemaphore> semaphore) override;
-    void waitSemaphore(sk_sp<GrSemaphore> semaphore) override;
-    void checkFinishProcs() override;
-
-    sk_sp<GrSemaphore> prepareTextureForCrossContextUsage(GrTexture*) override;
-
-private:
-    void onResetContext(uint32_t resetBits) override {}
-
-    virtual void querySampleLocations(GrRenderTarget*, SkTArray<SkPoint>*) override {}
-
-    sk_sp<GrTexture> onCreateTexture(const GrSurfaceDesc& desc, SkBudgeted budgeted,
-                                     const GrMipLevel texels[], int mipLevelCount) override;
-
-    sk_sp<GrTexture> onCreateCompressedTexture(int width, int height, SkImage::CompressionType,
-                                               SkBudgeted, const void* data) override;
-
-    sk_sp<GrTexture> onWrapBackendTexture(const GrBackendTexture&, GrWrapOwnership,
-                                          GrWrapCacheable, GrIOType) override;
-    sk_sp<GrTexture> onWrapRenderableBackendTexture(const GrBackendTexture&, int sampleCnt,
-                                                    GrColorType, GrWrapOwnership,
-                                                    GrWrapCacheable) override;
-    sk_sp<GrRenderTarget> onWrapBackendRenderTarget(const GrBackendRenderTarget&) override;
-
-    sk_sp<GrRenderTarget> onWrapBackendTextureAsRenderTarget(const GrBackendTexture&,
-                                                             int sampleCnt) override;
-
-    sk_sp<GrGpuBuffer> onCreateBuffer(size_t size, GrGpuBufferType type, GrAccessPattern,
-                                      const void* data) override;
-
-    bool onReadPixels(GrSurface* surface,
-                      int left, int top, int width, int height,
-                      GrColorType, void* buffer, size_t rowBytes) override;
-
-    bool onWritePixels(GrSurface* surface,
-                       int left, int top, int width, int height,
-                       GrColorType, const GrMipLevel texels[], int mipLevelCount) override;
-
-    bool onTransferPixelsTo(GrTexture*, int left, int top, int width, int height,
-                            GrColorType colorType, GrGpuBuffer* transferBuffer,
-                            size_t offset, size_t rowBytes) override;
-
-    bool onTransferPixelsFrom(GrSurface* surface, int left, int top, int width, int height,
-                              GrColorType, GrGpuBuffer* transferBuffer, size_t offset) override;
-
-    void onResolveRenderTarget(GrRenderTarget* target) override {
-    }
-
-    bool onRegenerateMipMapLevels(GrTexture*) override;
-
-    bool onCopySurface(GrSurface* dst, GrSurface* src,
-                       const SkIRect& srcRect, const SkIPoint& dstPoint,
-                       bool canDiscardOutsideDstRect) override;
-
-    void onFinishFlush(GrSurfaceProxy*[], int n, SkSurface::BackendSurfaceAccess access,
-                       const GrFlushInfo& info, const GrPrepareForExternalIORequests&) override;
-
-    dawn::Device                                 fDevice;
-    dawn::Queue                                  fQueue;    // Must be Graphics queue
-
-    // Compiler used for compiling sksl into spirv. We only want to create the compiler once since
-    // there is significant overhead to the first compile of any compiler.
-    std::unique_ptr<SkSL::Compiler> fCompiler;
-
-    std::unique_ptr<GrDawnGpuRTCommandBuffer> fCachedRTCommandBuffer;
-
-    typedef GrGpu INHERITED;
-};
-
-#endif
diff --git a/src/gpu/dawn/GrDawnGpuCommandBuffer.cpp b/src/gpu/dawn/GrDawnGpuCommandBuffer.cpp
deleted file mode 100644
index 39e3169..0000000
--- a/src/gpu/dawn/GrDawnGpuCommandBuffer.cpp
+++ /dev/null
@@ -1,152 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "GrDawnGpuCommandBuffer.h"
-
-#include "src/gpu/GrFixedClip.h"
-#include "src/gpu/GrMesh.h"
-#include "src/gpu/GrOpFlushState.h"
-#include "src/gpu/GrPipeline.h"
-#include "src/gpu/GrRenderTargetPriv.h"
-#include "src/gpu/GrTexturePriv.h"
-#include "src/gpu/dawn/GrDawnGpu.h"
-#include "src/gpu/dawn/GrDawnRenderTarget.h"
-#include "include/core/SkRect.h"
-
-void GrDawnGpuTextureCommandBuffer::copy(GrSurface* src, const SkIRect& srcRect,
-                                         const SkIPoint& dstPoint) {
-}
-
-void GrDawnGpuTextureCommandBuffer::insertEventMarker(const char* msg) {
-}
-
-void GrDawnGpuTextureCommandBuffer::submit() {
-    for (int i = 0; i < fCopies.count(); ++i) {
-        CopyInfo& copyInfo = fCopies[i];
-        fGpu->copySurface(fTexture, copyInfo.fSrc, copyInfo.fSrcRect, copyInfo.fDstPoint);
-    }
-}
-
-GrDawnGpuTextureCommandBuffer::~GrDawnGpuTextureCommandBuffer() {}
-
-////////////////////////////////////////////////////////////////////////////////
-
-dawn::LoadOp to_dawn_load_op(GrLoadOp loadOp) {
-    switch (loadOp) {
-        case GrLoadOp::kLoad:
-            return dawn::LoadOp::Load;
-        case GrLoadOp::kClear:
-            return dawn::LoadOp::Clear;
-        case GrLoadOp::kDiscard:
-        default:
-            SK_ABORT("Invalid LoadOp");
-            return dawn::LoadOp::Load;
-    }
-}
-
-GrDawnGpuRTCommandBuffer::GrDawnGpuRTCommandBuffer(GrDawnGpu* gpu,
-                                                   GrRenderTarget* rt, GrSurfaceOrigin origin,
-                                                   const LoadAndStoreInfo& colorInfo,
-                                                   const StencilLoadAndStoreInfo& stencilInfo)
-        : INHERITED(rt, origin)
-        , fGpu(gpu) {
-    this->init();
-}
-
-void GrDawnGpuRTCommandBuffer::init() {
-}
-
-
-GrDawnGpuRTCommandBuffer::~GrDawnGpuRTCommandBuffer() {
-}
-
-GrGpu* GrDawnGpuRTCommandBuffer::gpu() { return fGpu; }
-
-void GrDawnGpuRTCommandBuffer::end() {
-}
-
-void GrDawnGpuRTCommandBuffer::submit() {
-    if (fCommandBuffer) {
-        fGpu->queue().Submit(1, &fCommandBuffer);
-    }
-}
-
-void GrDawnGpuRTCommandBuffer::insertEventMarker(const char* msg) {
-}
-
-void GrDawnGpuRTCommandBuffer::transferFrom(const SkIRect& srcRect, GrColorType bufferColorType,
-                                            GrGpuBuffer* transferBuffer, size_t offset) {
-    fGpu->transferPixelsFrom(fRenderTarget, srcRect.fLeft, srcRect.fTop, srcRect.width(),
-                             srcRect.height(), bufferColorType, transferBuffer, offset);
-}
-
-void GrDawnGpuRTCommandBuffer::onClearStencilClip(const GrFixedClip& clip, bool insideStencilMask) {
-}
-
-void GrDawnGpuRTCommandBuffer::onClear(const GrFixedClip& clip, const SkPMColor4f& color) {
-}
-
-////////////////////////////////////////////////////////////////////////////////
-
-void GrDawnGpuRTCommandBuffer::inlineUpload(GrOpFlushState* state,
-                                            GrDeferredTextureUploadFn& upload) {
-}
-
-void GrDawnGpuRTCommandBuffer::copy(GrSurface* src, const SkIRect& srcRect,
-                                    const SkIPoint& dstPoint) {
-}
-
-////////////////////////////////////////////////////////////////////////////////
-
-void GrDawnGpuRTCommandBuffer::bindGeometry(const GrBuffer* indexBuffer,
-                                            const GrBuffer* vertexBuffer,
-                                            const GrBuffer* instanceBuffer) {
-}
-
-void GrDawnGpuRTCommandBuffer::onDraw(const GrPrimitiveProcessor& primProc,
-                                      const GrPipeline& pipeline,
-                                      const GrPipeline::FixedDynamicState* fixedDynamicState,
-                                      const GrPipeline::DynamicStateArrays* dynamicStateArrays,
-                                      const GrMesh meshes[],
-                                      int meshCount,
-                                      const SkRect& bounds) {
-    if (!meshCount) {
-        return;
-    }
-    GrFragmentProcessor::Iter iter(pipeline);
-
-    for (int i = 0; i < meshCount; ++i) {
-        const GrMesh& mesh = meshes[i];
-        mesh.sendToGpu(this);
-    }
-}
-
-void GrDawnGpuRTCommandBuffer::sendInstancedMeshToGpu(GrPrimitiveType,
-                                                      const GrBuffer* vertexBuffer,
-                                                      int vertexCount,
-                                                      int baseVertex,
-                                                      const GrBuffer* instanceBuffer,
-                                                      int instanceCount,
-                                                      int baseInstance) {
-    this->bindGeometry(nullptr, vertexBuffer, instanceBuffer);
-    fGpu->stats()->incNumDraws();
-}
-
-void GrDawnGpuRTCommandBuffer::sendIndexedInstancedMeshToGpu(GrPrimitiveType,
-                                                             const GrBuffer* indexBuffer,
-                                                             int indexCount,
-                                                             int baseIndex,
-                                                             const GrBuffer* vertexBuffer,
-                                                             int baseVertex,
-                                                             const GrBuffer* instanceBuffer,
-                                                             int instanceCount,
-                                                             int baseInstance,
-                                                             GrPrimitiveRestart restart) {
-    this->bindGeometry(indexBuffer, vertexBuffer, instanceBuffer);
-    fGpu->stats()->incNumDraws();
-}
-
diff --git a/src/gpu/dawn/GrDawnGpuCommandBuffer.h b/src/gpu/dawn/GrDawnGpuCommandBuffer.h
deleted file mode 100644
index 4a6fd46..0000000
--- a/src/gpu/dawn/GrDawnGpuCommandBuffer.h
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrDawnGpuCommandBuffer_DEFINED
-#define GrDawnGpuCommandBuffer_DEFINED
-
-#include "src/gpu/GrGpuCommandBuffer.h"
-
-#include "src/gpu/GrColor.h"
-#include "src/gpu/GrMesh.h"
-#include "include/gpu/GrTypes.h"
-#include "dawn/dawncpp.h"
-
-class GrDawnGpu;
-class GrDawnRenderTarget;
-
-class GrDawnGpuTextureCommandBuffer : public GrGpuTextureCommandBuffer {
-public:
-    GrDawnGpuTextureCommandBuffer(GrDawnGpu* gpu, GrTexture* texture, GrSurfaceOrigin origin)
-        : INHERITED(texture, origin)
-        , fGpu(gpu) {
-    }
-
-    ~GrDawnGpuTextureCommandBuffer() override;
-
-    void copy(GrSurface* src, const SkIRect& srcRect, const SkIPoint& dstPoint) override;
-
-    void insertEventMarker(const char*) override;
-
-private:
-    void submit();
-
-    struct CopyInfo {
-        CopyInfo(GrSurface* src, GrSurfaceOrigin srcOrigin, const SkIRect& srcRect,
-                 const SkIPoint& dstPoint)
-            : fSrc(src), fSrcOrigin(srcOrigin), fSrcRect(srcRect), fDstPoint(dstPoint) {}
-
-        GrSurface*      fSrc;
-        GrSurfaceOrigin fSrcOrigin;
-        SkIRect         fSrcRect;
-        SkIPoint        fDstPoint;
-    };
-
-    GrDawnGpu*                   fGpu;
-    SkTArray<CopyInfo>          fCopies;
-
-    typedef GrGpuTextureCommandBuffer INHERITED;
-};
-
-class GrDawnGpuRTCommandBuffer : public GrGpuRTCommandBuffer, private GrMesh::SendToGpuImpl {
-public:
-    GrDawnGpuRTCommandBuffer(GrDawnGpu*, GrRenderTarget*, GrSurfaceOrigin,
-                             const LoadAndStoreInfo&,
-                             const StencilLoadAndStoreInfo&);
-
-    ~GrDawnGpuRTCommandBuffer() override;
-
-    void begin() override { }
-    void end() override;
-
-    void transferFrom(const SkIRect& srcRect, GrColorType bufferColorType,
-                      GrGpuBuffer* transferBuffer, size_t offset) override;
-    void insertEventMarker(const char*) override;
-
-    void inlineUpload(GrOpFlushState* state, GrDeferredTextureUploadFn& upload) override;
-
-    void copy(GrSurface* src, const SkIRect& srcRect, const SkIPoint& dstPoint) override;
-
-    void submit();
-
-private:
-    void init();
-
-    GrGpu* gpu() override;
-
-    // Bind vertex and index buffers
-    void bindGeometry(const GrBuffer* indexBuffer,
-                      const GrBuffer* vertexBuffer,
-                      const GrBuffer* instanceBuffer);
-
-    void onDraw(const GrPrimitiveProcessor& primProc,
-                const GrPipeline& pipeline,
-                const GrPipeline::FixedDynamicState* fixedDynamicState,
-                const GrPipeline::DynamicStateArrays* dynamicStateArrays,
-                const GrMesh mesh[],
-                int meshCount,
-                const SkRect& bounds) override;
-
-    void sendMeshToGpu(GrPrimitiveType primType, const GrBuffer* vertexBuffer, int vertexCount,
-                       int baseVertex) final {
-        this->sendInstancedMeshToGpu(primType, vertexBuffer, vertexCount, baseVertex,
-                                     nullptr, 1, 0);
-    }
-
-    void sendIndexedMeshToGpu(GrPrimitiveType primType,
-                              const GrBuffer* indexBuffer, int indexCount, int baseIndex,
-                              uint16_t /*minIndexValue*/, uint16_t /*maxIndexValue*/,
-                              const GrBuffer* vertexBuffer, int baseVertex,
-                              GrPrimitiveRestart restart) final {
-        this->sendIndexedInstancedMeshToGpu(primType, indexBuffer, indexCount, baseIndex,
-                                            vertexBuffer, baseVertex, nullptr, 1, 0, restart);
-    }
-
-    void sendInstancedMeshToGpu(GrPrimitiveType,
-                                const GrBuffer* vertexBuffer, int vertexCount, int baseVertex,
-                                const GrBuffer* instanceBuffer, int instanceCount,
-                                int baseInstance) final;
-
-    void sendIndexedInstancedMeshToGpu(GrPrimitiveType,
-                                       const GrBuffer* indexBuffer, int indexCount, int baseIndex,
-                                       const GrBuffer* vertexBuffer, int baseVertex,
-                                       const GrBuffer* instanceBuffer, int instanceCount,
-                                       int baseInstance, GrPrimitiveRestart) final;
-
-    void onClear(const GrFixedClip&, const SkPMColor4f& color) override;
-
-    void onClearStencilClip(const GrFixedClip&, bool insideStencilMask) override;
-
-    struct InlineUploadInfo {
-        InlineUploadInfo(GrOpFlushState* state, const GrDeferredTextureUploadFn& upload)
-                : fFlushState(state), fUpload(upload) {}
-
-        GrOpFlushState* fFlushState;
-        GrDeferredTextureUploadFn fUpload;
-    };
-
-    struct CopyInfo {
-        CopyInfo(GrSurface* src, GrSurfaceOrigin srcOrigin, const SkIRect& srcRect,
-                 const SkIPoint& dstPoint)
-            : fSrc(src), fSrcOrigin(srcOrigin), fSrcRect(srcRect), fDstPoint(dstPoint) {}
-
-        GrSurface*      fSrc;
-        GrSurfaceOrigin fSrcOrigin;
-        SkIRect         fSrcRect;
-        SkIPoint        fDstPoint;
-    };
-
-    dawn::CommandBuffer         fCommandBuffer;
-    GrDawnGpu*                  fGpu;
-
-    typedef GrGpuRTCommandBuffer INHERITED;
-};
-
-#endif
diff --git a/src/gpu/dawn/GrDawnRenderTarget.cpp b/src/gpu/dawn/GrDawnRenderTarget.cpp
deleted file mode 100644
index 02b8a5b..0000000
--- a/src/gpu/dawn/GrDawnRenderTarget.cpp
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "GrDawnRenderTarget.h"
-
-#include "include/gpu/GrBackendSurface.h"
-#include "src/gpu/dawn/GrDawnGpu.h"
-#include "src/gpu/dawn/GrDawnUtil.h"
-
-GrDawnRenderTarget::GrDawnRenderTarget(GrDawnGpu* gpu,
-                                       const GrSurfaceDesc& desc,
-                                       const GrDawnImageInfo& info,
-                                       GrBackendObjectOwnership ownership)
-    : GrSurface(gpu, desc)
-    , GrRenderTarget(gpu, desc)
-    , fInfo(info) {
-    this->registerWithCacheWrapped(GrWrapCacheable::kNo);
-}
-
-GrDawnRenderTarget*
-GrDawnRenderTarget::Create(GrDawnGpu* gpu,
-                           const GrSurfaceDesc& desc,
-                           const GrDawnImageInfo& info,
-                           GrBackendObjectOwnership ownership) {
-    SkASSERT(1 == info.fLevelCount);
-    return new GrDawnRenderTarget(gpu, desc, info, ownership);
-}
-
-sk_sp<GrDawnRenderTarget>
-GrDawnRenderTarget::MakeWrapped(GrDawnGpu* gpu,
-                                const GrSurfaceDesc& desc,
-                                const GrDawnImageInfo& info) {
-    return sk_sp<GrDawnRenderTarget>(
-        GrDawnRenderTarget::Create(gpu, desc, info,
-                                  GrBackendObjectOwnership::kBorrowed));
-}
-
-bool GrDawnRenderTarget::completeStencilAttachment() {
-    return true;
-}
-
-GrDawnRenderTarget::~GrDawnRenderTarget() {
-}
-
-void GrDawnRenderTarget::onRelease() {
-    INHERITED::onRelease();
-}
-
-void GrDawnRenderTarget::onAbandon() {
-    INHERITED::onAbandon();
-}
-
-GrBackendRenderTarget GrDawnRenderTarget::getBackendRenderTarget() const {
-    return GrBackendRenderTarget(this->width(), this->height(), this->numSamples(),
-                                 this->numSamples(), fInfo);
-}
-
-GrBackendFormat GrDawnRenderTarget::backendFormat() const {
-    return GrBackendFormat::MakeDawn(fInfo.fFormat);
-}
diff --git a/src/gpu/dawn/GrDawnRenderTarget.h b/src/gpu/dawn/GrDawnRenderTarget.h
deleted file mode 100644
index 271eff0..0000000
--- a/src/gpu/dawn/GrDawnRenderTarget.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#ifndef GrDawnRenderTarget_DEFINED
-#define GrDawnRenderTarget_DEFINED
-
-#include "include/gpu/dawn/GrDawnTypes.h"
-#include "include/gpu/GrRenderTarget.h"
-
-class GrDawnGpu;
-
-class GrDawnRenderTarget: public GrRenderTarget {
-public:
-    static sk_sp<GrDawnRenderTarget> MakeWrapped(GrDawnGpu*, const GrSurfaceDesc&,
-                                                 const GrDawnImageInfo&);
-
-    ~GrDawnRenderTarget() override;
-
-    // override of GrRenderTarget
-    ResolveType getResolveType() const override {
-        if (this->numSamples() > 1) {
-            return kCanResolve_ResolveType;
-        }
-        return kAutoResolves_ResolveType;
-    }
-
-    bool canAttemptStencilAttachment() const override {
-        return true;
-    }
-
-    GrBackendRenderTarget getBackendRenderTarget() const override;
-    GrBackendFormat backendFormat() const override;
-
-protected:
-    GrDawnRenderTarget(GrDawnGpu* gpu,
-                       const GrSurfaceDesc& desc,
-                       const GrDawnImageInfo& info,
-                       GrBackendObjectOwnership);
-
-    GrDawnGpu* getDawnGpu() const;
-
-    void onAbandon() override;
-    void onRelease() override;
-    void onSetRelease(sk_sp<GrRefCntedCallback> releaseHelper) override {}
-
-    // This accounts for the texture's memory and any MSAA renderbuffer's memory.
-    size_t onGpuMemorySize() const override {
-        // The plus 1 is to account for the resolve texture or if not using msaa the RT itself
-        int numSamples = this->numSamples() + 1;
-        return GrSurface::ComputeSize(this->config(), this->width(), this->height(),
-                                      numSamples, GrMipMapped::kNo);
-    }
-
-    static GrDawnRenderTarget* Create(GrDawnGpu*, const GrSurfaceDesc&,
-                                      const GrDawnImageInfo&, GrBackendObjectOwnership);
-
-    bool completeStencilAttachment() override;
-    GrDawnImageInfo fInfo;
-    typedef GrRenderTarget INHERITED;
-};
-
-#endif
diff --git a/src/gpu/dawn/GrDawnUtil.cpp b/src/gpu/dawn/GrDawnUtil.cpp
deleted file mode 100644
index fbb7b43..0000000
--- a/src/gpu/dawn/GrDawnUtil.cpp
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "GrDawnUtil.h"
-
-GrPixelConfig GrDawnFormatToPixelConfig(dawn::TextureFormat format) {
-    switch (format) {
-        case dawn::TextureFormat::R8G8B8A8Unorm:
-            return kRGBA_8888_GrPixelConfig;
-        case dawn::TextureFormat::B8G8R8A8Unorm:
-            return kBGRA_8888_GrPixelConfig;
-        case dawn::TextureFormat::R8Unorm:
-            return kAlpha_8_GrPixelConfig;
-        case dawn::TextureFormat::D32FloatS8Uint:
-        default:
-            SkASSERT(false);
-            return kRGBA_8888_GrPixelConfig;
-    }
-}
-
-bool GrPixelConfigToDawnFormat(GrPixelConfig config, dawn::TextureFormat* format) {
-    switch (config) {
-        case kRGBA_8888_GrPixelConfig:
-        case kRGBA_4444_GrPixelConfig:
-        case kRGB_565_GrPixelConfig:
-        case kGray_8_GrPixelConfig:
-            *format = dawn::TextureFormat::R8G8B8A8Unorm;
-            return true;
-        case kBGRA_8888_GrPixelConfig:
-            *format = dawn::TextureFormat::B8G8R8A8Unorm;
-            return true;
-        case kAlpha_8_GrPixelConfig:
-            *format = dawn::TextureFormat::R8Unorm;
-            return true;
-        default:
-            return false;
-    }
-}
diff --git a/src/gpu/dawn/GrDawnUtil.h b/src/gpu/dawn/GrDawnUtil.h
deleted file mode 100644
index 6cf973d..0000000
--- a/src/gpu/dawn/GrDawnUtil.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrDawnUtil_DEFINED
-#define GrDawnUtil_DEFINED
-
-#include "include/private/GrTypesPriv.h"
-#include "dawn/dawncpp.h"
-
-GrPixelConfig GrDawnFormatToPixelConfig(dawn::TextureFormat format);
-bool GrPixelConfigToDawnFormat(GrPixelConfig config, dawn::TextureFormat* format);
-
-#endif // GrDawnUtil_DEFINED
diff --git a/tools/flags/CommonFlagsConfig.cpp b/tools/flags/CommonFlagsConfig.cpp
index 1515130..e297feb 100644
--- a/tools/flags/CommonFlagsConfig.cpp
+++ b/tools/flags/CommonFlagsConfig.cpp
@@ -82,9 +82,6 @@
     { "angle_gl_es3_msaa8",    "gpu", "api=angle_gl_es3,samples=8" },
     { "commandbuffer",         "gpu", "api=commandbuffer" },
     { "mock",                  "gpu", "api=mock" },
-#ifdef SK_DAWN
-    { "dawn",                  "gpu", "api=dawn" },
-#endif
 #ifdef SK_VULKAN
     { "vk",                    "gpu", "api=vulkan" },
     { "vknostencils",          "gpu", "api=vulkan,stencils=false" },
@@ -271,12 +268,6 @@
         return true;
     }
 #endif
-#ifdef SK_DAWN
-    if (value.equals("dawn")) {
-        *outContextType = GrContextFactory::kDawn_ContextType;
-        return true;
-    }
-#endif
     return false;
 }
 
diff --git a/tools/gpu/GrContextFactory.cpp b/tools/gpu/GrContextFactory.cpp
index d0defdc..e5bea06 100644
--- a/tools/gpu/GrContextFactory.cpp
+++ b/tools/gpu/GrContextFactory.cpp
@@ -20,9 +20,6 @@
 #ifdef SK_METAL
 #include "tools/gpu/mtl/MtlTestContext.h"
 #endif
-#ifdef SK_DAWN
-#include "tools/gpu/dawn/DawnTestContext.h"
-#endif
 #include "src/gpu/GrCaps.h"
 #include "src/gpu/gl/GrGLGpu.h"
 #include "tools/gpu/mock/MockTestContext.h"
@@ -233,17 +230,6 @@
             break;
         }
 #endif
-#ifdef SK_DAWN
-        case GrBackendApi::kDawn: {
-            DawnTestContext* dawnSharedContext = masterContext
-                    ? static_cast<DawnTestContext*>(masterContext->fTestContext) : nullptr;
-            testCtx.reset(CreatePlatformDawnTestContext(dawnSharedContext));
-            if (!testCtx) {
-                return ContextInfo();
-            }
-            break;
-        }
-#endif
         case GrBackendApi::kMock: {
             TestContext* sharedContext = masterContext ? masterContext->fTestContext : nullptr;
             SkASSERT(kMock_ContextType == type);
diff --git a/tools/gpu/GrContextFactory.h b/tools/gpu/GrContextFactory.h
index a85e7ae..e08dbbd 100644
--- a/tools/gpu/GrContextFactory.h
+++ b/tools/gpu/GrContextFactory.h
@@ -41,7 +41,6 @@
         kCommandBuffer_ContextType,  //! Chromium command buffer OpenGL ES context.
         kVulkan_ContextType,         //! Vulkan
         kMetal_ContextType,          //! Metal
-        kDawn_ContextType,           //! Dawn
         kMock_ContextType,           //! Mock context that does not draw.
         kLastContextType = kMock_ContextType
     };
@@ -72,8 +71,6 @@
                 return GrBackendApi::kVulkan;
             case kMetal_ContextType:
                 return GrBackendApi::kMetal;
-            case kDawn_ContextType:
-                return GrBackendApi::kDawn;
             case kMock_ContextType:
                 return GrBackendApi::kMock;
             default:
@@ -103,8 +100,6 @@
                 return "Vulkan";
             case kMetal_ContextType:
                 return "Metal";
-            case kDawn_ContextType:
-                return "Dawn";
             case kMock_ContextType:
                 return "Mock";
         }
diff --git a/tools/gpu/dawn/DawnTestContext.cpp b/tools/gpu/dawn/DawnTestContext.cpp
deleted file mode 100644
index a2fc2d1..0000000
--- a/tools/gpu/dawn/DawnTestContext.cpp
+++ /dev/null
@@ -1,250 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "dawn/dawncpp.h"
-#include "dawn_native/DawnNative.h"
-#include "DawnTestContext.h"
-
-#ifdef SK_BUILD_FOR_UNIX
-#include "GL/glx.h"
-#endif
-
-#ifdef SK_BUILD_FOR_WIN
-#include <windows.h>
-#endif
-
-#define USE_OPENGL_BACKEND 0
-
-#ifdef SK_DAWN
-#include "dawn/dawn.h"
-#include "include/gpu/GrContext.h"
-#include "tools/AutoreleasePool.h"
-#if USE_OPENGL_BACKEND
-#include "dawn_native/OpenGLBackend.h"
-#endif
-
-#if defined(SK_BUILD_FOR_MAC) && USE_OPENGL_BACKEND
-#include <dlfcn.h>
-static void* getProcAddressMacOS(const char* procName) {
-    return dlsym(RTLD_DEFAULT, procName);
-}
-#endif
-
-namespace {
-
-#ifdef SK_BUILD_FOR_WIN
-class ProcGetter {
-public:
-    typedef void(*Proc)();
-
-    ProcGetter()
-      : fModule(LoadLibraryA("opengl32.dll")) {
-        SkASSERT(!fInstance);
-        fInstance = this;
-    }
-
-    ~ProcGetter() {
-        if (fModule) {
-            FreeLibrary(fModule);
-        }
-        fInstance = nullptr;
-    }
-
-    static void* getProcAddress(const char* name) {
-        return fInstance->getProc(name);
-    }
-
-private:
-    Proc getProc(const char* name) {
-        PROC proc;
-        if (proc = GetProcAddress(fModule, name)) {
-            return (Proc) proc;
-        }
-        if (proc = wglGetProcAddress(name)) {
-            return (Proc) proc;
-        }
-        return nullptr;
-    }
-
-    HMODULE fModule;
-    static ProcGetter* fInstance;
-};
-
-ProcGetter* ProcGetter::fInstance;
-#endif
-
-class DawnFence {
-public:
-    DawnFence(const dawn::Device& device, const dawn::Buffer& buffer)
-      : fDevice(device), fBuffer(buffer), fCalled(false) {
-        fBuffer.MapReadAsync(callback, this);
-    }
-
-    bool wait() {
-        while (!fCalled) {
-            fDevice.Tick();
-        }
-        return true;
-    }
-
-    ~DawnFence() {
-    }
-
-    static void callback(DawnBufferMapAsyncStatus status, const void* data, uint64_t dataLength,
-                         void* userData) {
-        DawnFence* fence = static_cast<DawnFence*>(userData);
-        fence->fCalled = true;
-    }
-    dawn::Buffer buffer() { return fBuffer; }
-
-private:
-    dawn::Device                   fDevice;
-    dawn::Buffer                   fBuffer;
-    bool                           fCalled;
-};
-
-/**
- * Implements sk_gpu_test::FenceSync for Dawn.
- */
-class DawnFenceSync : public sk_gpu_test::FenceSync {
-public:
-    DawnFenceSync(dawn::Device device) : fDevice(device) {
-    }
-
-    ~DawnFenceSync() override {
-    }
-
-    sk_gpu_test::PlatformFence SK_WARN_UNUSED_RESULT insertFence() const override {
-        dawn::Buffer buffer;
-        if (fBuffers.empty()) {
-            dawn::BufferDescriptor desc;
-            desc.usage = dawn::BufferUsageBit::MapRead | dawn::BufferUsageBit::TransferDst;
-            desc.size = 1;
-            buffer = fDevice.CreateBuffer(&desc);
-        } else {
-            buffer = fBuffers.back();
-            fBuffers.pop_back();
-        }
-        DawnFence* fence = new DawnFence(fDevice, buffer);
-        return reinterpret_cast<sk_gpu_test::PlatformFence>(fence);
-    }
-
-    bool waitFence(sk_gpu_test::PlatformFence opaqueFence) const override {
-        fAutoreleasePool.drain();
-        DawnFence* fence = reinterpret_cast<DawnFence*>(opaqueFence);
-        return fence->wait();
-    }
-
-    void deleteFence(sk_gpu_test::PlatformFence opaqueFence) const override {
-        DawnFence* fence = reinterpret_cast<DawnFence*>(opaqueFence);
-        fBuffers.push_back(fence->buffer());
-        delete fence;
-    }
-
-private:
-    dawn::Device                      fDevice;
-    mutable std::vector<dawn::Buffer> fBuffers;
-    mutable AutoreleasePool           fAutoreleasePool;
-    typedef sk_gpu_test::FenceSync INHERITED;
-};
-
-class DawnTestContextImpl : public sk_gpu_test::DawnTestContext {
-public:
-    static dawn::Device createDevice(const dawn_native::Instance& instance,
-                                     dawn_native::BackendType type) {
-        DawnProcTable backendProcs = dawn_native::GetProcs();
-        dawnSetProcs(&backendProcs);
-
-        std::vector<dawn_native::Adapter> adapters = instance.GetAdapters();
-        for (dawn_native::Adapter adapter : adapters) {
-            if (adapter.GetBackendType() == type) {
-                return adapter.CreateDevice();
-            }
-        }
-        return nullptr;
-    }
-
-    static DawnTestContext* Create(DawnTestContext* sharedContext) {
-        std::unique_ptr<dawn_native::Instance> instance = std::make_unique<dawn_native::Instance>();
-        dawn::Device device;
-        if (sharedContext) {
-            device = sharedContext->getDevice();
-        } else {
-            dawn_native::BackendType type;
-#if USE_OPENGL_BACKEND
-            dawn_native::opengl::AdapterDiscoveryOptions adapterOptions;
-            adapterOptions.getProc = reinterpret_cast<void*(*)(const char*)>(
-#if defined(SK_BUILD_FOR_UNIX)
-                glXGetProcAddress
-#elif defined(SK_BUILD_FOR_MAC)
-                getProcAddressMacOS
-#elif defined(SK_BUILD_FOR_WIN)
-                ProcGetter::getProcAddress
-#endif
-            );
-            instance->DiscoverAdapters(&adapterOptions);
-            type = dawn_native::BackendType::OpenGL;
-#else
-            instance->DiscoverDefaultAdapters();
-#if defined(SK_BUILD_FOR_MAC)
-            type = dawn_native::BackendType::Metal;
-#elif defined(SK_BUILD_FOR_WIN)
-            type = dawn_native::BackendType::D3D12;
-#elif defined(SK_BUILD_FOR_UNIX)
-            type = dawn_native::BackendType::Vulkan;
-#endif
-#endif
-            device = createDevice(*instance, type);
-        }
-        if (!device) {
-            return nullptr;
-        }
-        return new DawnTestContextImpl(std::move(instance), device);
-    }
-
-    ~DawnTestContextImpl() override { this->teardown(); }
-
-    void testAbandon() override {}
-
-    // There is really nothing to here since we don't own any unqueued command buffers here.
-    void submit() override {}
-
-    void finish() override {}
-
-    sk_sp<GrContext> makeGrContext(const GrContextOptions& options) override {
-        return GrContext::MakeDawn(fDevice, options);
-    }
-
-protected:
-    void teardown() override {
-        INHERITED::teardown();
-    }
-
-private:
-    DawnTestContextImpl(std::unique_ptr<dawn_native::Instance> instance,
-                        const dawn::Device& device)
-            : DawnTestContext(device)
-            , fInstance(std::move(instance)) {
-        fFenceSync.reset(new DawnFenceSync(fDevice));
-    }
-
-    void onPlatformMakeCurrent() const override {}
-    std::function<void()> onPlatformGetAutoContextRestore() const override  { return nullptr; }
-    void onPlatformSwapBuffers() const override {}
-    std::unique_ptr<dawn_native::Instance> fInstance;
-
-    typedef sk_gpu_test::DawnTestContext INHERITED;
-};
-}  // anonymous namespace
-
-namespace sk_gpu_test {
-DawnTestContext* CreatePlatformDawnTestContext(DawnTestContext* sharedContext) {
-    return DawnTestContextImpl::Create(sharedContext);
-}
-}  // namespace sk_gpu_test
-
-#endif
diff --git a/tools/gpu/dawn/DawnTestContext.h b/tools/gpu/dawn/DawnTestContext.h
deleted file mode 100644
index 4afd018..0000000
--- a/tools/gpu/dawn/DawnTestContext.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef DawnTestContext_DEFINED
-#define DawnTestContext_DEFINED
-
-#include "tools/gpu/TestContext.h"
-
-#ifdef SK_DAWN
-
-namespace sk_gpu_test {
-class DawnTestContext : public TestContext {
-public:
-    virtual GrBackend backend() override { return GrBackendApi::kDawn; }
-
-    const dawn::Device& getDevice() {
-        return fDevice;
-    }
-
-protected:
-    DawnTestContext(const dawn::Device& device) : fDevice(device) {}
-
-    dawn::Device fDevice;
-
-private:
-    typedef TestContext INHERITED;
-};
-
-/**
- * Creates Dawn context object bound to the Dawn library.
- */
-DawnTestContext* CreatePlatformDawnTestContext(DawnTestContext*);
-
-}  // namespace sk_gpu_test
-
-#endif
-
-#endif
diff --git a/tools/sk_app/unix/WindowContextFactory_unix.h b/tools/sk_app/unix/WindowContextFactory_unix.h
index a80f2c9..e6d033b 100644
--- a/tools/sk_app/unix/WindowContextFactory_unix.h
+++ b/tools/sk_app/unix/WindowContextFactory_unix.h
@@ -9,10 +9,6 @@
 #ifndef WindowContextFactory_unix_DEFINED
 #define WindowContextFactory_unix_DEFINED
 
-// dawncpp.h and X.h don't get along. Include this first, before X11 defines None, Success etc.
-#ifdef SK_DAWN
-#include "dawn/dawncpp.h"
-#endif
 #include <X11/Xlib.h>
 #include <GL/glx.h>
 typedef Window XWindow;