Update CanvasResourceProvider::WritePixels to work with OOPR

Currently CanvasResourceProvider::WritePixels writes directly to
SkCanvas but this won't work with OOPR Canvas which won't have access to
Skia in the renderer process. This CL adds an override for
CanvasResourceProviderSharedImage which checks for OOP support and calls
RasterInterface::WritePixels if it's in use.

Bug: 1063725
Change-Id: Ib2ebfe48c3c5b837caf242b1e64c926287072b00
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2239763Reviewed-by: Khushal <khushalsagar@chromium.org>
Commit-Queue: Nathan Zabriskie <nazabris@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#777253}

third_party/blink/renderer/platform/graphics/canvas_2d_layer_bridge.cc

@@ -422,12 +422,14 @@ bool Canvas2DLayerBridge::WritePixels(const SkImageInfo& orig_info,
     if (!GetOrCreateResourceProvider())
       return false;
   }
-
-  last_record_tainted_by_write_pixels_ = true;
   have_recorded_draw_commands_ = false;
 
-  ResourceProvider()->WritePixels(orig_info, pixels, row_bytes, x, y);
-  return true;
+  bool wrote_pixels =
+      ResourceProvider()->WritePixels(orig_info, pixels, row_bytes, x, y);
+  if (wrote_pixels)
+    last_record_tainted_by_write_pixels_ = true;
+
+  return wrote_pixels;
 }
 
 void Canvas2DLayerBridge::SkipQueuedDrawCommands() {

third_party/blink/renderer/platform/graphics/canvas_resource_provider.cc

@@ -238,6 +238,26 @@ class CanvasResourceProviderSharedImage : public CanvasResourceProvider {
     return resource()->TextureTarget();
   }
 
+  bool WritePixels(const SkImageInfo& orig_info,
+                   const void* pixels,
+                   size_t row_bytes,
+                   int x,
+                   int y) override {
+    if (!use_oop_rasterization_) {
+      return CanvasResourceProvider::WritePixels(orig_info, pixels, row_bytes,
+                                                 x, y);
+    }
+
+    TRACE_EVENT0("blink", "CanvasResourceProviderSharedImage::WritePixels");
+    if (IsGpuContextLost())
+      return false;
+
+    RasterInterface()->WritePixels(
+        GetBackingMailboxForOverwrite(kOrderingBarrier), x, y,
+        GetBackingTextureTarget(), row_bytes, orig_info, pixels);
+    return true;
+  }
+
   scoped_refptr<CanvasResource> CreateResource() final {
     TRACE_EVENT0("blink", "CanvasResourceProviderSharedImage::CreateResource");
     if (IsGpuContextLost())

third_party/blink/renderer/platform/graphics/canvas_resource_provider.h

@@ -178,11 +178,11 @@ class PLATFORM_EXPORT CanvasResourceProvider
 
   SkSurface* GetSkSurface() const;
   bool IsGpuContextLost() const;
-  bool WritePixels(const SkImageInfo& orig_info,
-                   const void* pixels,
-                   size_t row_bytes,
-                   int x,
-                   int y);
+  virtual bool WritePixels(const SkImageInfo& orig_info,
+                           const void* pixels,
+                           size_t row_bytes,
+                           int x,
+                           int y);
 
   virtual gpu::Mailbox GetBackingMailboxForOverwrite(
       MailboxSyncMode sync_mode) {