Add timestamps to synthesized events.

content/browser/renderer_host/input/synthetic_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_GESTURE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "content/common/content_export.h"
@@ skipping 28 matching lines @@
     GESTURE_FINISHED,
     GESTURE_SOURCE_TYPE_NOT_IMPLEMENTED,
     GESTURE_SOURCE_TYPE_NOT_SUPPORTED_BY_PLATFORM,
     GESTURE_RESULT_MAX = GESTURE_SOURCE_TYPE_NOT_SUPPORTED_BY_PLATFORM
   };
 
   // Update the state of the gesture and forward the appropriate events to the
   // platform. This function is called repeatedly by the synthetic gesture
   // controller until it stops returning GESTURE_RUNNING.
   virtual Result ForwardInputEvents(
-      const base::TimeDelta& interval, SyntheticGestureTarget* target) = 0;
+      const base::TimeTicks& timestamp, SyntheticGestureTarget* target) = 0;
 
- private:
+ protected:
+  static double ConvertTimestampToSeconds(const base::TimeTicks& timestamp);
+
   DISALLOW_COPY_AND_ASSIGN(SyntheticGesture);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_H_