cc: Delete the RendererClient class.

cc/test/fake_renderer_client.h

-// Copyright 2014 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_TEST_FAKE_RENDERER_CLIENT_H_
-#define CC_TEST_FAKE_RENDERER_CLIENT_H_
-
-#include "cc/output/renderer.h"
-
-namespace cc {
-
-class FakeRendererClient : public RendererClient {
- public:
-  FakeRendererClient();
-
-  // RendererClient methods.
-  void SetFullRootLayerDamage() override;
-
-  // Methods added for test.
-  int set_full_root_layer_damage_count() const {
-    return set_full_root_layer_damage_count_;
-  }
-
- private:
-  int set_full_root_layer_damage_count_;
-};
-
-}  // namespace cc
-
-#endif  // CC_TEST_FAKE_RENDERER_CLIENT_H_