Keeping track of descendants that draw content instead of recalcualting

cc/layers/texture_layer.h

Index: cc/layers/texture_layer.h
diff --git a/cc/layers/texture_layer.h b/cc/layers/texture_layer.h
index aa2ed561daa508269684b54ee196ca566e0953a0..fb25da629b8e46aaaff80bb27284595b809bf8b2 100644
--- a/cc/layers/texture_layer.h
+++ b/cc/layers/texture_layer.h
@@ -134,7 +134,6 @@ class CC_EXPORT TextureLayer : public Layer {
   virtual void SetNeedsDisplayRect(const gfx::RectF& dirty_rect) OVERRIDE;
 
   virtual void SetLayerTreeHost(LayerTreeHost* layer_tree_host) OVERRIDE;
-  virtual bool DrawsContent() const OVERRIDE;
   virtual bool Update(ResourceUpdateQueue* queue,
                       const OcclusionTracker<Layer>* occlusion) OVERRIDE;
   virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
@@ -143,6 +142,7 @@ class CC_EXPORT TextureLayer : public Layer {
  protected:
   explicit TextureLayer(TextureLayerClient* client);
   virtual ~TextureLayer();
+  virtual bool HasDrawableContent() const OVERRIDE;
 
  private:
   void SetTextureMailboxInternal(