Add latency measurement system

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"
@@ skipping 32 matching lines @@
     virtual void onVSyncParametersChanged(base::TimeTicks timebase, base::TimeDelta interval) = 0;
     virtual void onCanDrawStateChanged(bool canDraw) = 0;
     virtual void onHasPendingTreeStateChanged(bool hasPendingTree) = 0;
     virtual void setNeedsRedrawOnImplThread() = 0;
     virtual void setNeedsCommitOnImplThread() = 0;
     virtual void setNeedsManageTilesOnImplThread() = 0;
     virtual void postAnimationEventsToMainThreadOnImplThread(scoped_ptr<AnimationEventsVector>, base::Time wallClockTime) = 0;
     // Returns true if resources were deleted by this call.
     virtual bool reduceContentsTextureMemoryOnImplThread(size_t limitBytes, int priorityCutoff) = 0;
     virtual void sendManagedMemoryStats() = 0;
+    virtual void onReceivedLatencyInfo(const LatencyInfo& latencyInfo) = 0;
 };
 
 // PinchZoomViewport models the bounds and offset of the viewport that is used during a pinch-zoom operation.
 // It tracks the layout-space dimensions of the viewport before any applied scale, and then tracks the layout-space
 // coordinates of the viewport respecting the pinch settings.
 class CC_EXPORT PinchZoomViewport {
 public:
     PinchZoomViewport();
 
     float totalPageScaleFactor() const;
@@ skipping 54 matching lines @@
                                     public TileManagerClient,
                                     public OutputSurfaceClient {
     typedef std::vector<LayerImpl*> LayerList;
 
 public:
     static scoped_ptr<LayerTreeHostImpl> create(const LayerTreeSettings&, LayerTreeHostImplClient*, Proxy*);
     virtual ~LayerTreeHostImpl();
 
     // InputHandlerClient implementation
     virtual InputHandlerClient::ScrollStatus scrollBegin(gfx::Point, InputHandlerClient::ScrollInputType) OVERRIDE;
-    virtual bool scrollBy(const gfx::Point&, const gfx::Vector2d&) OVERRIDE;
+    virtual bool scrollBy(int64 frame_number, const gfx::Point&, const gfx::Vector2d&) OVERRIDE;
     virtual void scrollEnd() OVERRIDE;
     virtual void pinchGestureBegin() OVERRIDE;
     virtual void pinchGestureUpdate(float, gfx::Point) OVERRIDE;
     virtual void pinchGestureEnd() OVERRIDE;
     virtual void startPageScaleAnimation(gfx::Vector2d targetOffset, bool anchorPoint, float pageScale, base::TimeTicks startTime, base::TimeDelta duration) OVERRIDE;
     virtual void scheduleAnimation() OVERRIDE;
     virtual bool haveTouchEventHandlersAt(const gfx::Point&) OVERRIDE;
 
     struct CC_EXPORT FrameData : public RenderPassSink {
         FrameData();
@@ skipping 38 matching lines @@
     virtual bool shouldClearRootRenderPass() const OVERRIDE;
     virtual CompositorFrameMetadata makeCompositorFrameMetadata() const OVERRIDE;
 
     // TileManagerClient implementation.
     virtual void ScheduleManageTiles() OVERRIDE;
     virtual void ScheduleCheckForCompletedSetPixels() OVERRIDE;
 
     // OutputSurfaceClient implementation.
     virtual void OnVSyncParametersChanged(base::TimeTicks timebase, base::TimeDelta interval) OVERRIDE;
     virtual void OnSendFrameToParentCompositorAck(const CompositorFrameAck&) OVERRIDE;
+    virtual void OnReceivedLatencyInfo(const LatencyInfo& latency_info) OVERRIDE;
 
     // Called from LayerTreeImpl.
     void OnCanDrawStateChangedForTree(LayerTreeImpl*);
 
     // Implementation
     bool canDraw();
     OutputSurface* outputSurface() const;
 
     std::string layerTreeAsText() const;
     std::string layerTreeAsJson() const;
@@ skipping 60 matching lines @@
     void setHasTransparentBackground(bool transparent) { m_hasTransparentBackground = transparent; }
     bool needsAnimateLayers() const { return !m_animationRegistrar->active_animation_controllers().empty(); }
 
     bool needsUpdateDrawProperties() const { return m_needsUpdateDrawProperties; }
     void setNeedsUpdateDrawProperties() { m_needsUpdateDrawProperties = true; }
 
     void setNeedsRedraw();
 
     void renderingStats(RenderingStats*) const;
 
+    void setLatencyInfo(const LatencyInfo& latency_info);
+
     void sendManagedMemoryStats(
        size_t memoryVisibleBytes,
        size_t memoryVisibleAndNearbyBytes,
        size_t memoryUseBytes);
 
     FrameRateCounter* fpsCounter() const { return m_fpsCounter.get(); }
     DebugRectHistory* debugRectHistory() const { return m_debugRectHistory.get(); }
     ResourceProvider* resourceProvider() const { return m_resourceProvider.get(); }
 
     Proxy* proxy() const { return m_proxy; }
@@ skipping 124 matching lines @@
     int64 m_cumulativeNumLayersDrawn;
 
     int64 m_cumulativeNumMissingTiles;
 
     size_t m_lastSentMemoryVisibleBytes;
     size_t m_lastSentMemoryVisibleAndNearbyBytes;
     size_t m_lastSentMemoryUseBytes;
 
     scoped_ptr<AnimationRegistrar> m_animationRegistrar;
 
+    LatencyInfo m_latencyInfo;
+    bool m_createdFrame;
+
     DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYER_TREE_HOST_IMPL_H_