Revert "Add a deferred copy surface"

This reverts commit 4431de6af930a8638c194b072558ea3a4b79d908.

Reason for revert: ANGLE errors (at the very least)

Original change's description:
> Add a deferred copy surface
> 
> This CL forces all GrSurface copies to go through a GrSurfaceContext (rather than GrContext).
> 
> There is a bit of goofiness going on here until read/writePixels is also consolidated in GrSurfaceContext and a proxy-backed SkImage/SkSurface is added.
> 
> Change-Id: Iab1867668d8146a766201158a251b9174438ee2b
> Reviewed-on: https://skia-review.googlesource.com/5773
> Reviewed-by: Brian Osman <brianosman@google.com>
> Reviewed-by: Robert Phillips <robertphillips@google.com>
> Commit-Queue: Robert Phillips <robertphillips@google.com>
> 

TBR=bsalomon@google.com,robertphillips@google.com,brianosman@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I61408d9e306b9b1ab32f93ab086e95184e12857f
Reviewed-on: https://skia-review.googlesource.com/5938
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 2e66c0c..ff5b026 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -541,6 +541,43 @@
     fDrawingManager->prepareSurfaceForExternalIO(surface);
 }
 
+bool GrContext::copySurface(GrSurface* dst, GrSurface* src, const SkIRect& srcRect,
+                            const SkIPoint& dstPoint) {
+    ASSERT_SINGLE_OWNER
+    RETURN_FALSE_IF_ABANDONED
+    GR_AUDIT_TRAIL_AUTO_FRAME(&fAuditTrail, "GrContext::copySurface");
+
+    if (!src || !dst) {
+        return false;
+    }
+    ASSERT_OWNED_RESOURCE(src);
+    ASSERT_OWNED_RESOURCE(dst);
+
+    // We don't allow conversion between integer configs and float/fixed configs.
+    if (GrPixelConfigIsSint(dst->config()) != GrPixelConfigIsSint(src->config())) {
+        return false;
+    }
+
+#ifndef ENABLE_MDB
+    // We can't yet fully defer copies to textures, so GrTextureContext::copySurface will
+    // execute the copy immediately. Ensure the data is ready.
+    src->flushWrites();
+#endif
+
+    sk_sp<GrSurfaceContext> surfaceContext(
+        this->contextPriv().makeWrappedSurfaceContext(sk_ref_sp(dst)));
+
+    if (!surfaceContext) {
+        return false;
+    }
+
+    if (!surfaceContext->copySurface(src, srcRect, dstPoint)) {
+        return false;
+    }
+
+    return true;
+}
+
 void GrContext::flushSurfaceWrites(GrSurface* surface) {
     ASSERT_SINGLE_OWNER
     RETURN_IF_ABANDONED
@@ -602,36 +639,8 @@
     }
 }
 
-sk_sp<GrSurfaceContext> GrContextPriv::makeDeferredSurfaceContext(const GrSurfaceDesc& dstDesc,
-                                                                  SkBudgeted isDstBudgeted) {
-
-    sk_sp<GrSurfaceProxy> proxy = GrSurfaceProxy::MakeDeferred(*fContext->caps(), dstDesc,
-                                                               SkBackingFit::kExact, isDstBudgeted);
-
-    if (proxy->asRenderTargetProxy()) {
-        return this->drawingManager()->makeRenderTargetContext(std::move(proxy), nullptr, nullptr);
-    } else {
-        SkASSERT(proxy->asTextureProxy());
-        return this->drawingManager()->makeTextureContext(std::move(proxy));
-    }
-
-    return nullptr;
-}
-
-sk_sp<GrSurfaceContext> GrContextPriv::makeTestSurfaceContext(sk_sp<GrSurfaceProxy> proxy) {
-
-    if (proxy->asRenderTargetProxy()) {
-        return this->drawingManager()->makeRenderTargetContext(std::move(proxy), nullptr, nullptr);
-    } else {
-        SkASSERT(proxy->asTextureProxy());
-        return this->drawingManager()->makeTextureContext(std::move(proxy));
-    }
-
-    return nullptr;
-}
-
 sk_sp<GrRenderTargetContext> GrContextPriv::makeBackendTextureRenderTargetContext(
-                                                                   const GrBackendTextureDesc& desc,
+                                                                   const GrBackendTextureDesc& desc, 
                                                                    sk_sp<SkColorSpace> colorSpace,
                                                                    const SkSurfaceProps* props,
                                                                    GrWrapOwnership ownership) {