cc: Remove DelegatingRendererLayerClient

cc/layers/delegated_renderer_layer_client.h

-// Copyright 2013 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_DELEGATED_RENDERER_LAYER_CLIENT_H_
-#define CC_LAYERS_DELEGATED_RENDERER_LAYER_CLIENT_H_
-
-#include "cc/base/cc_export.h"
-
-namespace cc {
-
-class CC_EXPORT DelegatedRendererLayerClient {
- public:
-  // Called after the object passed in SetFrameData was handed over
-  // to the DelegatedRendererLayerImpl.
-  virtual void DidCommitFrameData() = 0;
-
-  // Called to inform the owner of the layer that unused resources can be
-  // grabbed off the DelegatedRendererLayer.
-  virtual void UnusedResourcesAreAvailable() = 0;
-
- protected:
-  virtual ~DelegatedRendererLayerClient() {}
-};
-
-}  // namespace cc
-#endif  // CC_LAYERS_DELEGATED_RENDERER_LAYER_CLIENT_H_