Update ui::PointerEvent to support mouse wheel and capture change events.

ash/wm/immersive_fullscreen_controller.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 ASH_WM_IMMERSIVE_FULLSCREEN_CONTROLLER_H_
 #define ASH_WM_IMMERSIVE_FULLSCREEN_CONTROLLER_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 76 matching lines @@
   void OnTouchEvent(const ui::TouchEvent& event,
                     const gfx::Point& location_in_screen);
   // Processes a GestureEvent. This may call SetHandled() on the supplied event.
   void OnGestureEvent(ui::GestureEvent* event,
                       const gfx::Point& location_in_screen);
 
   // views::PointerWatcher:
   void OnPointerEventObserved(const ui::PointerEvent& event,
                               const gfx::Point& location_in_screen,
                               views::Widget* target) override;
-  void OnMouseCaptureChanged() override;
 
   // views::WidgetObserver overrides:
   void OnWidgetDestroying(views::Widget* widget) override;
 
   // gfx::AnimationDelegate overrides:
   void AnimationEnded(const gfx::Animation* animation) override;
   void AnimationProgressed(const gfx::Animation* animation) override;
 
   // ash::ImmersiveRevealedLock::Delegate overrides:
   void LockRevealedState(AnimateReveal animate_reveal) override;
@@ skipping 131 matching lines @@
   std::unique_ptr<ImmersiveGestureHandler> immersive_gesture_handler_;
 
   base::WeakPtrFactory<ImmersiveFullscreenController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ImmersiveFullscreenController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_IMMERSIVE_FULLSCREEN_CONTROLLER_H_