Reland "Reland "Always include public/include headers for vulkan and just guard src files with SK_VULKAN.""

This reverts commit a55e214bbe3942a098d97906a0f008d59dd1fafb.

Reason for revert:google3 should be fixed now

Original change's description:
> Revert "Reland "Always include public/include headers for vulkan and just guard src files with SK_VULKAN.""
> 
> This reverts commit 55aea84baa53f2d7e7e876b09fd590f046ff9ab9.
> 
> Reason for revert: Google3 roll failing like
> 
> third_party/skia/HEAD/include/gpu/vk/GrVkDefines.h:15:10: fatal error: '../../../third_party/vulkan/SkiaVulkan.h' file not found
> #include "../../../third_party/vulkan/SkiaVulkan.h"
> 
> 
> Original change's description:
> > Reland "Always include public/include headers for vulkan and just guard src files with SK_VULKAN."
> > 
> > This reverts commit 684b506f3589ecc78eebe8d92082be31a5fbe348.
> > 
> > Reason for revert: Chrome change has landed to fix broken chrome roll.
> > 
> > Original change's description:
> > > Revert "Always include public/include headers for vulkan and just guard src files with SK_VULKAN."
> > >
> > > This reverts commit 6e2d607334cc57c22e3a52179743763828ea84b2.
> > >
> > > Reason for revert: chrome roll
> > >
> > > Original change's description:
> > > > Always include public/include headers for vulkan and just guard src files with SK_VULKAN.
> > > >
> > > > This should allow a client to build a skia library that doesn't use vulkan but still
> > > > has all the public headers defined so that they don't have to build two versions of
> > > > their code.
> > > >
> > > > Bug: chromium:862144
> > > > Change-Id: I0eecbe0bc48123619f217e2cf318eb9a8c77ccb2
> > > > Reviewed-on: https://skia-review.googlesource.com/158661
> > > > Reviewed-by: Brian Salomon <bsalomon@google.com>
> > > > Commit-Queue: Greg Daniel <egdaniel@google.com>
> > >
> > > TBR=egdaniel@google.com,bsalomon@google.com,cblume@chromium.org
> > >
> > > Change-Id: I76ae6f435333755fa5d546fc1e5999a324b4fd05
> > > No-Presubmit: true
> > > No-Tree-Checks: true
> > > No-Try: true
> > > Bug: chromium:862144
> > > Reviewed-on: https://skia-review.googlesource.com/c/159000
> > > Reviewed-by: Mike Klein <mtklein@google.com>
> > > Commit-Queue: Mike Klein <mtklein@google.com>
> > 
> > TBR=egdaniel@google.com,mtklein@google.com,bsalomon@google.com,cblume@chromium.org
> > 
> > Change-Id: Id019b428f880efbd7ead8dee4178c6190469a290
> > No-Presubmit: true
> > No-Tree-Checks: true
> > No-Try: true
> > Bug: chromium:862144
> > Reviewed-on: https://skia-review.googlesource.com/c/159145
> > Commit-Queue: Greg Daniel <egdaniel@google.com>
> > Reviewed-by: Greg Daniel <egdaniel@google.com>
> 
> TBR=egdaniel@google.com,mtklein@google.com,bsalomon@google.com,cblume@chromium.org
> 
> Change-Id: I0e5c72e2d79dac28021b02168a9e11ac08db765c
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: chromium:862144
> Reviewed-on: https://skia-review.googlesource.com/c/159155
> Reviewed-by: Mike Klein <mtklein@google.com>
> Commit-Queue: Mike Klein <mtklein@google.com>

TBR=egdaniel@google.com,mtklein@google.com,bsalomon@google.com,cblume@chromium.org

Change-Id: I58f7f8ca5281cd5fe0c145c01e9b9465c9b9ec31
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:862144
Reviewed-on: https://skia-review.googlesource.com/159260
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/src/gpu/GrBackendSurface.cpp b/src/gpu/GrBackendSurface.cpp
index 7e10cb2..0e6df50 100644
--- a/src/gpu/GrBackendSurface.cpp
+++ b/src/gpu/GrBackendSurface.cpp
@@ -39,10 +39,13 @@
     return nullptr;
 }
 
-#ifdef SK_VULKAN
 GrBackendFormat::GrBackendFormat(VkFormat vkFormat)
         : fBackend(kVulkan_GrBackend)
+#ifdef SK_VULKAN
         , fValid(true)
+#else
+        ,fValid(false)
+#endif
         , fVkFormat(vkFormat) {
 }
 
@@ -52,7 +55,6 @@
     }
     return nullptr;
 }
-#endif
 
 #ifdef SK_METAL
 GrBackendFormat::GrBackendFormat(GrMTLPixelFormat mtlFormat)
@@ -82,13 +84,17 @@
     return nullptr;
 }
 
-#ifdef SK_VULKAN
 GrBackendTexture::GrBackendTexture(int width,
                                    int height,
                                    const GrVkImageInfo& vkInfo)
+#ifdef SK_VULKAN
         : GrBackendTexture(width, height, vkInfo,
                            sk_sp<GrVkImageLayout>(new GrVkImageLayout(vkInfo.fImageLayout))) {}
+#else
+        : fIsValid(false) {}
+#endif
 
+#ifdef SK_VULKAN
 GrBackendTexture::GrBackendTexture(int width,
                                    int height,
                                    const GrVkImageInfo& vkInfo,
@@ -173,11 +179,11 @@
         case kOpenGL_GrBackend:
             fGLInfo = that.fGLInfo;
             break;
-#ifdef SK_VULKAN
         case kVulkan_GrBackend:
+#ifdef SK_VULKAN
             fVkInfo.assign(that.fVkInfo, this->isValid());
-            break;
 #endif
+            break;
 #ifdef SK_METAL
         case kMetal_GrBackend:
             fMtlInfo = that.fMtlInfo;
@@ -193,28 +199,39 @@
     return *this;
 }
 
-#ifdef SK_VULKAN
 bool GrBackendTexture::getVkImageInfo(GrVkImageInfo* outInfo) const {
+#ifdef SK_VULKAN
     if (this->isValid() && kVulkan_GrBackend == fBackend) {
         *outInfo = fVkInfo.snapImageInfo();
         return true;
     }
+#endif
     return false;
 }
 
 void GrBackendTexture::setVkImageLayout(VkImageLayout layout) {
+#ifdef SK_VULKAN
     if (this->isValid() && kVulkan_GrBackend == fBackend) {
         fVkInfo.setImageLayout(layout);
     }
+#endif
 }
 
+// We need a stubbed version of GrVkImageLayout for non vulkan builds
+#ifndef SK_VULKAN
+class GrVkImageLayout : public SkRefCnt {
+    GrVkImageLayout(VkImageLayout layout) {}
+};
+#endif
+
 sk_sp<GrVkImageLayout> GrBackendTexture::getGrVkImageLayout() const {
+#ifdef SK_VULKAN
     if (this->isValid() && kVulkan_GrBackend == fBackend) {
         return fVkInfo.getGrVkImageLayout();
     }
+#endif
     return nullptr;
 }
-#endif
 
 #ifdef SK_METAL
 bool GrBackendTexture::getMtlTextureInfo(GrMtlTextureInfo* outInfo) const {
@@ -284,7 +301,6 @@
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
-#ifdef SK_VULKAN
 GrBackendRenderTarget::GrBackendRenderTarget(int width,
                                              int height,
                                              int sampleCnt,
@@ -299,9 +315,14 @@
                                              int height,
                                              int sampleCnt,
                                              const GrVkImageInfo& vkInfo)
+#ifdef SK_VULKAN
         : GrBackendRenderTarget(width, height, sampleCnt, vkInfo,
                                 sk_sp<GrVkImageLayout>(new GrVkImageLayout(vkInfo.fImageLayout))) {}
+#else
+        : fIsValid(false) {}
+#endif
 
+#ifdef SK_VULKAN
 GrBackendRenderTarget::GrBackendRenderTarget(int width,
                                              int height,
                                              int sampleCnt,
@@ -392,11 +413,11 @@
         case kOpenGL_GrBackend:
             fGLInfo = that.fGLInfo;
             break;
-#ifdef SK_VULKAN
         case kVulkan_GrBackend:
+#ifdef SK_VULKAN
             fVkInfo.assign(that.fVkInfo, this->isValid());
-            break;
 #endif
+            break;
 #ifdef SK_METAL
         case kMetal_GrBackend:
             fMtlInfo = that.fMtlInfo;
@@ -412,28 +433,32 @@
     return *this;
 }
 
-#ifdef SK_VULKAN
 bool GrBackendRenderTarget::getVkImageInfo(GrVkImageInfo* outInfo) const {
+#ifdef SK_VULKAN
     if (this->isValid() && kVulkan_GrBackend == fBackend) {
         *outInfo = fVkInfo.snapImageInfo();
         return true;
     }
+#endif
     return false;
 }
 
 void GrBackendRenderTarget::setVkImageLayout(VkImageLayout layout) {
+#ifdef SK_VULKAN
     if (this->isValid() && kVulkan_GrBackend == fBackend) {
         fVkInfo.setImageLayout(layout);
     }
+#endif
 }
 
 sk_sp<GrVkImageLayout> GrBackendRenderTarget::getGrVkImageLayout() const {
+#ifdef SK_VULKAN
     if (this->isValid() && kVulkan_GrBackend == fBackend) {
         return fVkInfo.getGrVkImageLayout();
     }
+#endif
     return nullptr;
 }
-#endif
 
 #ifdef SK_METAL
 bool GrBackendRenderTarget::getMtlTextureInfo(GrMtlTextureInfo* outInfo) const {
diff --git a/src/gpu/GrDirectContext.cpp b/src/gpu/GrDirectContext.cpp
index 14133cd..59b984c 100644
--- a/src/gpu/GrDirectContext.cpp
+++ b/src/gpu/GrDirectContext.cpp
@@ -147,14 +147,19 @@
     return context;
 }
 
-#ifdef SK_VULKAN
 sk_sp<GrContext> GrContext::MakeVulkan(const GrVkBackendContext& backendContext) {
+#ifdef SK_VULKAN
     GrContextOptions defaultOptions;
     return MakeVulkan(backendContext, defaultOptions);
+#else
+    return nullptr;
+#endif
 }
 
 sk_sp<GrContext> GrContext::MakeVulkan(const GrVkBackendContext& backendContext,
                                        const GrContextOptions& options) {
+#ifdef SK_VULKAN
+    GrContextOptions defaultOptions;
     sk_sp<GrContext> context(new GrDirectContext(kVulkan_GrBackend));
 
     context->fGpu = GrVkGpu::Make(backendContext, options, context.get());
@@ -167,8 +172,10 @@
         return nullptr;
     }
     return context;
-}
+#else
+    return nullptr;
 #endif
+}
 
 #ifdef SK_METAL
 sk_sp<GrContext> GrContext::MakeMetal(void* device, void* queue) {