Send compositor frame IPC with metadata.

cc/layer_tree_host_impl.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_HOST_IMPL_H_
 #define CC_LAYER_TREE_HOST_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
 #include "cc/animation_events.h"
 #include "cc/cc_export.h"
 #include "cc/input_handler.h"
 #include "cc/layer_sorter.h"
 #include "cc/render_pass.h"
 #include "cc/render_pass_sink.h"
 #include "cc/renderer.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/rect.h"
 #include <public/WebCompositorOutputSurfaceClient.h>
 
 namespace cc {
 
 class CompletionEvent;
+class CompositorFrameMetadata;
 class DebugRectHistory;
 class FrameRateCounter;
 class HeadsUpDisplayLayerImpl;
 class LayerImpl;
 class LayerTreeHostImplTimeSourceAdapter;
 class PageScaleAnimation;
 class RenderPassDrawQuad;
 class ResourceProvider;
 struct RendererCapabilities;
 struct RenderingStats;
@@ skipping 277 matching lines @@
 
     void sendDidLoseContextRecursive(LayerImpl*);
     void clearRenderSurfaces();
     bool ensureRenderSurfaceLayerList();
     void clearCurrentlyScrollingLayer();
 
     void animateScrollbarsRecursive(LayerImpl*, base::TimeTicks monotonicTime);
 
     void dumpRenderSurfaces(std::string*, int indent, const LayerImpl*) const;
 
+    CompositorFrameMetadata makeCompositorFrameMetadata() const;
+
     scoped_ptr<GraphicsContext> m_context;
     scoped_ptr<ResourceProvider> m_resourceProvider;
     scoped_ptr<Renderer> m_renderer;
     scoped_ptr<LayerImpl> m_rootLayerImpl;
     LayerImpl* m_rootScrollLayerImpl;
     LayerImpl* m_currentlyScrollingLayerImpl;
     HeadsUpDisplayLayerImpl* m_hudLayerImpl;
     int m_scrollingLayerIdFromPreviousTree;
     bool m_scrollDeltaIsInViewportSpace;
     LayerTreeSettings m_settings;
@@ skipping 30 matching lines @@
 
     size_t m_numImplThreadScrolls;
     size_t m_numMainThreadScrolls;
 
     DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYER_TREE_HOST_IMPL_H_