cc: Remove contents_texture_manager from LayerTreeHost(Impl) and proxy.

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index 36b06b709bc3d69ef8400517a4ad7d0a3cf0ae42..e6e91b8a37c2846f78a406e1a4b17f0a2dd2129c 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -121,7 +121,6 @@ class CC_EXPORT LayerTreeHost {
   bool output_surface_lost() const { return output_surface_lost_; }
   void DidCommitAndDrawFrame() { client_->DidCommitAndDrawFrame(); }
   void DidCompleteSwapBuffers() { client_->DidCompleteSwapBuffers(); }
-  void DeleteContentsTexturesOnImplThread(ResourceProvider* resource_provider);
   bool UpdateLayers();
 
   // Called when the compositor completed page scale animation.
@@ -227,10 +226,6 @@ class CC_EXPORT LayerTreeHost {
     has_transparent_background_ = transparent;
   }
 
-  PrioritizedResourceManager* contents_texture_manager() const {
-    return contents_texture_manager_.get();
-  }
-
   void SetVisible(bool visible);
   bool visible() const { return visible_; }
 
@@ -402,9 +397,6 @@ class CC_EXPORT LayerTreeHost {
   scoped_refptr<Layer> root_layer_;
   scoped_refptr<HeadsUpDisplayLayer> hud_layer_;
 
-  scoped_ptr<PrioritizedResourceManager> contents_texture_manager_;
-  scoped_ptr<PrioritizedResource> surface_memory_placeholder_;
-
   base::WeakPtr<InputHandler> input_handler_weak_ptr_;
   base::WeakPtr<TopControlsManager> top_controls_manager_weak_ptr_;