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

cc/layer_tree_host.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 CCLayerTreeHost_h
 #define CCLayerTreeHost_h
 
 #include <limits>
 
 #include "IntRect.h"
@@ skipping 29 matching lines @@
 namespace cc {
 
 class FontAtlas;
 class Layer;
 class LayerTreeHostImpl;
 class LayerTreeHostImplClient;
 class PrioritizedTextureManager;
 class ResourceUpdateQueue;
 class HeadsUpDisplayLayer;
 class Region;
+class RenderingStatsSubscriber;
 struct ScrollAndScaleSet;
 
 struct LayerTreeSettings {
     LayerTreeSettings();
     ~LayerTreeSettings();
 
     bool acceleratePainting;
     bool showFPSCounter;
     bool showPlatformLayerTree;
     bool showPaintRects;
@@ skipping 131 matching lines @@
 
     void startPageScaleAnimation(const IntSize& targetPosition, bool useAnchor, float scale, base::TimeDelta duration);
 
     void applyScrollAndScale(const ScrollAndScaleSet&);
     FloatPoint adjustEventPointForPinchZoom(const FloatPoint&) const;
     void setImplTransform(const WebKit::WebTransformationMatrix&);
 
     void startRateLimiter(WebKit::WebGraphicsContext3D*);
     void stopRateLimiter(WebKit::WebGraphicsContext3D*);
 
+    void startRecordingRenderingStats();
+    // This function will remove the running subscriber, and populate the given
+    // rendering stats object.
+    void stopRecordingRenderingStats(RenderingStats*);
+
     // RateLimitClient implementation
     virtual void rateLimit() OVERRIDE;
 
     bool bufferedUpdates();
     bool requestPartialTextureUpdate();
 
     void setDeviceScaleFactor(float);
     float deviceScaleFactor() const { return m_deviceScaleFactor; }
 
     void setFontAtlas(scoped_ptr<FontAtlas>);
@@ skipping 26 matching lines @@
     void setAnimationEventsRecursive(const AnimationEventsVector&, Layer*, base::Time wallClockTime);
 
     bool m_animating;
     bool m_needsAnimateLayers;
 
     base::CancelableClosure m_prepaintCallback;
 
     LayerTreeHostClient* m_client;
 
     int m_commitNumber;
+    // TODO(vollick): Nuke this once we've switched to the subscriber model.
     RenderingStats m_renderingStats;
+    scoped_ptr<RenderingStatsSubscriber> m_renderingStatsSubscriber;
 
     scoped_ptr<Proxy> m_proxy;
     bool m_rendererInitialized;
     bool m_contextLost;
     int m_numTimesRecreateShouldFail;
     int m_numFailedRecreateAttempts;
 
     scoped_refptr<Layer> m_rootLayer;
     scoped_refptr<HeadsUpDisplayLayer> m_hudLayer;
     scoped_ptr<FontAtlas> m_fontAtlas;
@@ skipping 24 matching lines @@
     size_t m_partialTextureUpdateRequests;
 
     static bool s_needsFilterContext;
 
     DISALLOW_COPY_AND_ASSIGN(LayerTreeHost);
 };
 
 }  // namespace cc
 
 #endif