cc: Some more cleanup and removing TODOs for validating resources.

cc/layers/layer_impl.h

Index: cc/layers/layer_impl.h
diff --git a/cc/layers/layer_impl.h b/cc/layers/layer_impl.h
index 730b188e35fe66576ad53ef28f625a8b4632c32e..cbd8e2f79cdda0f2f941e35d120a458dfb9042b5 100644
--- a/cc/layers/layer_impl.h
+++ b/cc/layers/layer_impl.h
@@ -247,6 +247,9 @@ class CC_EXPORT LayerImpl : public LayerAnimationValueObserver,
                            AppendQuadsData* append_quads_data) {}
   virtual void DidDraw(ResourceProvider* resource_provider);
 
+  // Verify that the resource ids in the quad are valid.
+  void ValidateQuadResources(const DrawQuad* quad) const;
+
   virtual void GetContentsResourceId(ResourceProvider::ResourceId* resource_id,
                                      gfx::Size* resource_size) const;