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

cc/layers/picture_layer_impl.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_LAYERS_PICTURE_LAYER_IMPL_H_
 #define CC_LAYERS_PICTURE_LAYER_IMPL_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 19 matching lines @@
       NON_EXPORTED_BASE(public PictureLayerTilingClient) {
  public:
   static std::unique_ptr<PictureLayerImpl> Create(LayerTreeImpl* tree_impl,
                                                   int id,
                                                   bool is_mask) {
     return base::WrapUnique(new PictureLayerImpl(tree_impl, id, is_mask));
   }
   ~PictureLayerImpl() override;
 
   bool is_mask() const { return is_mask_; }
+  void ResetRasterScale();
 
   // LayerImpl overrides.
   const char* LayerTypeAsString() const override;
   std::unique_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
   void PushPropertiesTo(LayerImpl* layer) override;
   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;
   void RecreateTileResources() override;
   Region GetInvalidationRegionForDebugging() override;
 
   // PictureLayerTilingClient overrides.
   ScopedTilePtr CreateTile(const Tile::CreateInfo& info) override;
   gfx::Size CalculateTileSize(const gfx::Size& content_bounds) const override;
   const Region* GetPendingInvalidation() override;
@@ skipping 104 matching lines @@
   // of comparing pointers, since objects pointed to are not guaranteed to
   // exist.
   std::vector<PictureLayerTiling*> last_append_quads_tilings_;
 
   DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_LAYER_IMPL_H_