NOT READY FOR REVIEW - switch to a subscriber model for rendering stats

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 CCLayerTreeHostImpl_h
 #define CCLayerTreeHostImpl_h
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
@@ skipping 10 matching lines @@
 
 class CompletionEvent;
 class DebugRectHistory;
 class FrameRateCounter;
 class HeadsUpDisplayLayerImpl;
 class LayerImpl;
 class LayerTreeHostImplTimeSourceAdapter;
 class PageScaleAnimation;
 class RenderPassDrawQuad;
 class ResourceProvider;
+class RenderingStatsSubscriber;
 struct RendererCapabilities;
 struct RenderingStats;
 
 // LayerTreeHost->Proxy callback interface.
 class LayerTreeHostImplClient {
 public:
     virtual void didLoseContextOnImplThread() = 0;
     virtual void onSwapBuffersCompleteOnImplThread() = 0;
     virtual void onVSyncParametersChanged(base::TimeTicks timebase, base::TimeDelta interval) = 0;
     virtual void onCanDrawStateChanged(bool canDraw) = 0;
@@ skipping 176 matching lines @@
 
     bool hasTransparentBackground() const { return m_hasTransparentBackground; }
     void setHasTransparentBackground(bool transparent) { m_hasTransparentBackground = transparent; }
 
     bool needsAnimateLayers() const { return m_needsAnimateLayers; }
     void setNeedsAnimateLayers() { m_needsAnimateLayers = true; }
 
     void setNeedsRedraw();
 
     void renderingStats(RenderingStats*) const;
+    void startRecordingRenderingStats();
+    void stopRecordingRenderingStats(RenderingStats*);
 
     void updateRootScrollLayerImplTransform();
 
     FrameRateCounter* fpsCounter() const { return m_fpsCounter.get(); }
     DebugRectHistory* debugRectHistory() const { return m_debugRectHistory.get(); }
     ResourceProvider* resourceProvider() const { return m_resourceProvider.get(); }
 
     class CullRenderPassesWithCachedTextures {
     public:
         bool shouldRemoveRenderPass(const RenderPassDrawQuad&, const FrameData&) const;
@@ skipping 101 matching lines @@
     LayerSorter m_layerSorter;
 
     // List of visible layers for the most recently prepared frame. Used for
     // rendering and input event hit testing.
     LayerList m_renderSurfaceLayerList;
 
     PinchZoomViewport m_pinchZoomViewport;
 
     scoped_ptr<FrameRateCounter> m_fpsCounter;
     scoped_ptr<DebugRectHistory> m_debugRectHistory;
+    scoped_ptr<RenderingStatsSubscriber> m_renderingStatsSubscriber;
 
     size_t m_numImplThreadScrolls;
     size_t m_numMainThreadScrolls;
 
     DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif