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

ui/views/widget/desktop_aura/desktop_activation_client.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 UI_VIEWS_WIDGET_DESKTOP_AURA_DESTKOP_ACTIVATION_CLIENT_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESTKOP_ACTIVATION_CLIENT_H_
 
 #include "base/basictypes.h"
 #include "base/observer_list.h"
 #include "base/scoped_observer.h"
@@ skipping 44 matching lines @@
   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
 
   // Overridden from aura::client::FocusChangeObserver:
   virtual void OnWindowFocused(aura::Window* window) OVERRIDE;
 
   // 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;
 
  private:
   void FocusWindowWithEvent(const ui::Event* event);
 
   aura::RootWindow* root_window_;
 
   // The current active window.
   aura::Window* current_active_;
 
   // True inside ActivateWindow(). Used to prevent recursion of focus
   // change notifications causing activation.
   bool updating_activation_;
 
   ObserverList<aura::client::ActivationChangeObserver> observers_;
 
   ScopedObserver<aura::Window, aura::WindowObserver> observer_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopActivationClient);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESTKOP_ACTIVATION_CLIENT_H_