Add timestamps to synthesized events.

content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h

Index: content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h
diff --git a/content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h b/content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h
index 53b4da54683ecdf306cb7e860346a632da5d8f7d..b598a18e730a5baaac3051a7209220c728efc4ad 100644
--- a/content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h
+++ b/content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h
@@ -24,7 +24,8 @@ class CONTENT_EXPORT SyntheticSmoothScrollGesture : public SyntheticGesture {
   virtual ~SyntheticSmoothScrollGesture();
 
   virtual SyntheticGesture::Result ForwardInputEvents(
-      const base::TimeDelta& interval, SyntheticGestureTarget* target) OVERRIDE;
+      const base::TimeTicks& timestamp,
+      SyntheticGestureTarget* target) OVERRIDE;
 
  private:
   enum GestureState {
@@ -36,31 +37,39 @@ class CONTENT_EXPORT SyntheticSmoothScrollGesture : public SyntheticGesture {
   };
 
   void ForwardTouchInputEvents(
-      const base::TimeDelta& interval, SyntheticGestureTarget* target);
+      const base::TimeTicks& timestamp, SyntheticGestureTarget* target);
   void ForwardMouseInputEvents(
-      const base::TimeDelta& interval, SyntheticGestureTarget* target);
+      const base::TimeTicks& timestamp, SyntheticGestureTarget* target);
 
-  void ForwardTouchEvent(SyntheticGestureTarget* target) const;
+  void ForwardTouchEvent(SyntheticGestureTarget* target,
+                         const base::TimeTicks& timestamp);
   void ForwardMouseWheelEvent(SyntheticGestureTarget* target,
-                              const gfx::Vector2dF& delta) const;
+                              const gfx::Vector2dF& delta,
+                              const base::TimeTicks& timestamp) const;
 
-  void PressTouchPoint(SyntheticGestureTarget* target);
-  void MoveTouchPoint(SyntheticGestureTarget* target);
-  void ReleaseTouchPoint(SyntheticGestureTarget* target);
+  void PressTouchPoint(SyntheticGestureTarget* target,
+                       const base::TimeTicks& timestamp);
+  void MoveTouchPoint(SyntheticGestureTarget* target,
+                      const gfx::Vector2dF& delta,
+                      const base::TimeTicks& timestamp);
+  void ReleaseTouchPoint(SyntheticGestureTarget* target,
+                         const base::TimeTicks& timestamp);
 
   void AddTouchSlopToDistance(SyntheticGestureTarget* target);
-  gfx::Vector2dF GetPositionDelta(const base::TimeDelta& interval) const;
+  gfx::Vector2dF GetPositionDeltaAtTime(const base::TimeTicks& timestamp)
+      const;
   gfx::Vector2dF ProjectLengthOntoScrollDirection(float delta_length) const;
-  gfx::Vector2dF ComputeRemainingDelta() const;
-  bool HasScrolledEntireDistance() const;
+  void ComputeAndSetStopScrollingTime();
+  base::TimeTicks ClampTimestamp(const base::TimeTicks& timestamp) const;
+  bool HasScrolledEntireDistance(const base::TimeTicks& timestamp) const;
 
   SyntheticSmoothScrollGestureParams params_;
-  gfx::Vector2dF total_delta_;
   gfx::Vector2d total_delta_discrete_;
   SyntheticWebTouchEvent touch_event_;
   SyntheticGestureParams::GestureSourceType gesture_source_type_;
   GestureState state_;
-  base::TimeDelta total_stopping_wait_time_;
+  base::TimeTicks start_time_;
+  base::TimeTicks stop_scrolling_time_;
 
   DISALLOW_COPY_AND_ASSIGN(SyntheticSmoothScrollGesture);
 };