Convert Aura to use ui::Event.

ash/touch/touch_uma.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 ASH_TOUCH_TOUCH_OBSERVER_UMA_H_
 #define ASH_TOUCH_TOUCH_OBSERVER_UMA_H_
 
 #include <map>
 
 #include "ash/shell.h"
 #include "ui/aura/event_filter.h"
 #include "ui/gfx/point.h"
 #include "ui/views/widget/widget.h"
 
 namespace aura {
-class GestureEvent;
-class TouchEvent;
 class Window;
 }
 
 namespace ash {
 namespace internal {
 
 // Records some touch/gesture event specific details (e.g. what gestures are
 // targetted to which components etc.)
 class TouchUMA {
  public:
   TouchUMA();
   ~TouchUMA();
 
   void RecordGestureEvent(aura::Window* target,
-                          const aura::GestureEvent& event);
+                          const ui::GestureEventImpl& event);
   void RecordTouchEvent(aura::Window* target,
-                        const aura::TouchEvent& event);
+                        const ui::TouchEventImpl& event);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TouchUMA);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_TOUCH_TOUCH_OBSERVER_UMA_H_