[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 306c6023136935d7c91c0a3e7a7580b5f3daffdf..a257fe49464207ac70c7b2114de1a20cab6bf47e 100644
--- a/cc/layers/picture_layer_impl.h
+++ b/cc/layers/picture_layer_impl.h
@@ -39,6 +39,8 @@ class CC_EXPORT PictureLayerImpl
 
   Layer::LayerMaskType mask_type() const { return mask_type_; }
 
+  void ResetRasterScale();
+
   // LayerImpl overrides.
   const char* LayerTypeAsString() const override;
   std::unique_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
@@ -46,7 +48,8 @@ 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;