Send compositor frame IPC with metadata.

cc/delegated_compositor_frame.h

 // Copyright 2012 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_COMPOSITOR_FRAME_H_
-#define CC_COMPOSITOR_FRAME_H_
+#ifndef CC_DELEGATED_COMPOSITOR_FRAME_H_
+#define CC_DELEGATED_COMPOSITOR_FRAME_H_
 
 #include "cc/cc_export.h"
+#include "cc/compositor_frame.h"
 #include "cc/render_pass.h"
 #include "cc/scoped_ptr_vector.h"
 #include "cc/transferable_resource.h"
 #include "ui/gfx/size.h"
 
 namespace cc {
 
-class CC_EXPORT CompositorFrame {
+class CC_EXPORT DelegatedCompositorFrame : public CompositorFrame {
  public:
-  CompositorFrame();
-  ~CompositorFrame();
+  DelegatedCompositorFrame();
+  ~DelegatedCompositorFrame();
 
   gfx::Size size;
   TransferableResourceList resource_list;
   ScopedPtrVector<RenderPass> render_pass_list;
 };
 
 }  // namespace cc
 
-#endif  // CC_COMPOSITOR_FRAME_H_
+#endif  // CC_DELEGATED_COMPOSITOR_FRAME_H_