cc: Make separate interface for BeginFrame ipc from OutputSurface

cc/test/layer_tree_test.h

 // Copyright 2011 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_LAYER_TREE_TEST_H_
 #define CC_TEST_LAYER_TREE_TEST_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread.h"
 #include "cc/animation/animation_delegate.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/layer_tree_host_impl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace Webkit {
 class WebGraphicsContext3D;
 }
 
 namespace cc {
+class ExternalBeginFrameSourceForTest;
 class FakeLayerTreeHostClient;
 class FakeOutputSurface;
 class LayerImpl;
 class LayerTreeHost;
 class LayerTreeHostClient;
 class LayerTreeHostImpl;
 class TestContextProvider;
 class TestWebGraphicsContext3D;
 
 // Used by test stubs to notify the test when something interesting happens.
@@ skipping 171 matching lines @@
   virtual scoped_ptr<FakeOutputSurface> CreateFakeOutputSurface(bool fallback);
 
   TestWebGraphicsContext3D* TestContext();
 
 
  private:
   LayerTreeSettings settings_;
   scoped_ptr<LayerTreeHostClientForTesting> client_;
   scoped_ptr<LayerTreeHost> layer_tree_host_;
   FakeOutputSurface* output_surface_;
+  ExternalBeginFrameSourceForTest* external_begin_frame_source_;
 
   bool beginning_;
   bool end_when_begin_returns_;
   bool timed_out_;
   bool scheduled_;
   bool started_;
   bool ended_;
   bool delegating_renderer_;
 
   int timeout_seconds_;
@@ skipping 105 matching lines @@
   SINGLE_AND_MULTI_THREAD_DIRECT_RENDERER_TEST_F(TEST_FIXTURE_NAME); \
   SINGLE_AND_MULTI_THREAD_DELEGATING_RENDERER_TEST_F(TEST_FIXTURE_NAME)
 
 // Some tests want to control when notify ready for activation occurs,
 // but this is not supported in the single-threaded case.
 #define SINGLE_AND_MULTI_THREAD_BLOCKNOTIFY_TEST_F(TEST_FIXTURE_NAME) \
   SINGLE_THREAD_NOIMPL_TEST_F(TEST_FIXTURE_NAME);                     \
   MULTI_THREAD_TEST_F(TEST_FIXTURE_NAME)
 
 #endif  // CC_TEST_LAYER_TREE_TEST_H_