Add timestamps to synthesized events.

content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h

 // Copyright 2013 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 CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_SMOOTH_SCROLL_GESTURE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_SMOOTH_SCROLL_GESTURE_H_
 
 #include "base/time/time.h"
 #include "content/browser/renderer_host/input/synthetic_gesture.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
 #include "content/common/content_export.h"
 #include "content/common/input/synthetic_smooth_scroll_gesture_params.h"
 #include "content/common/input/synthetic_web_input_event_builders.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/gfx/vector2d.h"
 #include "ui/gfx/vector2d_f.h"
 
 namespace content {
 
 class CONTENT_EXPORT SyntheticSmoothScrollGesture : public SyntheticGesture {
  public:
   explicit SyntheticSmoothScrollGesture(
       const SyntheticSmoothScrollGestureParams& params);
   virtual ~SyntheticSmoothScrollGesture();
 
   virtual SyntheticGesture::Result ForwardInputEvents(
-      const base::TimeDelta& interval, SyntheticGestureTarget* target) OVERRIDE;
+      const base::TimeTicks& timestamp,
+      SyntheticGestureTarget* target) OVERRIDE;
 
  private:
   enum GestureState {
     SETUP,
     STARTED,
     MOVING,
     STOPPING,
     DONE
   };
 
   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);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_SMOOTH_SCROLL_GESTURE_H_