events: Change gesture-event handler in EventHandler to not return any values.

ash/wm/activation_controller.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_WM_ACTIVATION_CONTROLLER_H_
 #define ASH_WM_ACTIVATION_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 59 matching lines @@
 
   // Overridden from aura::client::FocusChangeObserver:
   virtual void OnWindowFocused(aura::Window* window) OVERRIDE;
 
  private:
   // Overridden from ui::EventHandler:
   virtual ui::EventResult OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
   virtual ui::EventResult OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
   virtual ui::EventResult OnScrollEvent(ui::ScrollEvent* event) OVERRIDE;
   virtual ui::EventResult OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
-  virtual ui::EventResult OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
+  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
   // Implementation of ActivateWindow() with an Event.
   void ActivateWindowWithEvent(aura::Window* window,
                                const ui::Event* event);
 
   // Shifts activation to the next window, ignoring |window|. Returns the next
   // window.
   aura::Window* ActivateNextWindow(aura::Window* window);
 
   // Returns the next window that should be activated, ignoring |ignore|.
@@ skipping 24 matching lines @@
 
   scoped_ptr<ActivationControllerDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ActivationController);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_ACTIVATION_CONTROLLER_H_