Send compositor frame IPC with metadata.

cc/layer_tree_settings.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_LAYER_TREE_SETTINGS_H_
 #define CC_LAYER_TREE_SETTINGS_H_
 
 #include "base/basictypes.h"
 #include "cc/cc_export.h"
 #include "cc/layer_tree_debug_state.h"
 #include "ui/gfx/size.h"
 
 namespace cc {
 
 class CC_EXPORT LayerTreeSettings {
  public:
   LayerTreeSettings();
   ~LayerTreeSettings();
 
   bool acceleratePainting;
+  bool compositorFrameMessage;
   bool implSidePainting;
   bool renderVSyncEnabled;
   bool perTilePaintingEnabled;
   bool partialSwapEnabled;
   bool acceleratedAnimationEnabled;
   bool pageScalePinchZoomEnabled;
   bool backgroundColorInsteadOfCheckerboard;
   bool showOverdrawInTracing;
   bool canUseLCDText;
   double refreshRate;
   size_t maxPartialTextureUpdates;
   size_t numRasterThreads;
   gfx::Size defaultTileSize;
   gfx::Size maxUntiledLayerSize;
   gfx::Size minimumOcclusionTrackingSize;
 
   LayerTreeDebugState initialDebugState;
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYER_TREE_SETTINGS_H_