[2/5] Disable transformed rasterization if layer is opaque

cc/layers/picture_layer_impl.h

Index: cc/layers/picture_layer_impl.h
diff --git a/cc/layers/picture_layer_impl.h b/cc/layers/picture_layer_impl.h
index b69cc108da8a2baeed6c125e35362db17cce8a80..fe2cfdc62c0644bd68861e01d90ac527184a7e4f 100644
--- a/cc/layers/picture_layer_impl.h
+++ b/cc/layers/picture_layer_impl.h
@@ -37,6 +37,7 @@ class CC_EXPORT PictureLayerImpl
   ~PictureLayerImpl() override;
 
   bool is_mask() const { return is_mask_; }
+  void ResetRasterScale();
 
   // LayerImpl overrides.
   const char* LayerTypeAsString() const override;
@@ -45,7 +46,8 @@ class CC_EXPORT PictureLayerImpl
   void AppendQuads(RenderPass* render_pass,
                    AppendQuadsData* append_quads_data) override;
   void NotifyTileStateChanged(const Tile* tile) override;
-  void ResetRasterScale();
+  SimpleEnclosedRegion VisibleOpaqueRegion() const override;
+
   void DidBeginTracing() override;
   void ReleaseResources() override;
   void ReleaseTileResources() override;