Telemtry: hooks "chrome.gpuBenchmarking.smoothScrollBy" with java on android.

content/browser/renderer_host/basic_mouse_wheel_smooth_scroll_gesture.h

 // Copyright (c) 2012 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_BASIC_MOUSE_WHEEL_SMOOTH_SCROLL_GESTURE_
 #define CONTENT_BROWSER_RENDERER_HOST_BASIC_MOUSE_WHEEL_SMOOTH_SCROLL_GESTURE_
 
 #include "base/time.h"
 #include "content/port/browser/smooth_scroll_gesture.h"
 
 namespace content {
 
 class RenderWidgetHost;
 
 class BasicMouseWheelSmoothScrollGesture : public SmoothScrollGesture {
  public:
   BasicMouseWheelSmoothScrollGesture(bool scroll_down, int pixels_to_scroll,
                                      int mouse_event_x, int mouse_event_y);
 
   virtual bool ForwardInputEvents(base::TimeTicks now,
                                   RenderWidgetHost* host) OVERRIDE;
  private:
   virtual ~BasicMouseWheelSmoothScrollGesture();
 
   bool scroll_down_;
   int pixels_scrolled_;
   int pixels_to_scroll_;
   int mouse_event_x_;
   int mouse_event_y_;
-  base::TimeTicks last_tick_time_;
 };
 
 }  // namespace content
 
 #endif