cc: Cleanup class/struct forward declarations

cc/test/layer_tree_host_remote_for_testing.h

 // Copyright 2016 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_HOST_REMOTE_FOR_TESTING_H_
 #define CC_TEST_LAYER_TREE_HOST_REMOTE_FOR_TESTING_H_
 
 #include "base/macros.h"
 #include "cc/blimp/compositor_state_deserializer.h"
 #include "cc/blimp/layer_tree_host_remote.h"
 
-namespace gpu {
-class GpuMemoryBufferManager;
-}  // namespace gpu
-
 namespace cc {
 
 class AnimationHost;
+class CompositorProtoState;
 class FakeImageSerializationProcessor;
 class LayerTreeHostInProcess;
 class MutatorHost;
-class SharedBitmapManager;
 class TaskGraphRunner;
 
 // This is a version of LayerTreeHostRemote meant to be used for tests that want
 // to inspect the CompositorFrame produced when state updates from the remote
 // host are used by a compositor on the client.
 class LayerTreeHostRemoteForTesting : public LayerTreeHostRemote,
                                       public CompositorStateDeserializerClient {
  public:
   static std::unique_ptr<LayerTreeHostRemoteForTesting> Create(
       LayerTreeHostClient* client,
@@ skipping 66 matching lines @@
 
   std::unique_ptr<FakeImageSerializationProcessor>
       image_serialization_processor_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostRemoteForTesting);
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_LAYER_TREE_HOST_REMOTE_FOR_TESTING_H_