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

ui/views/controls/menu/menu_host_root_view.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_CONTROLS_MENU_MENU_HOST_ROOT_VIEW_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_HOST_ROOT_VIEW_H_
 
 #include "ui/views/widget/root_view.h"
 
 namespace views {
@@ skipping 14 matching lines @@
   void ClearSubmenu() { submenu_ = NULL; }
 
   // Overridden from View:
   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
   virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseMoved(const ui::MouseEvent& event) OVERRIDE;
   virtual bool OnMouseWheel(const ui::MouseWheelEvent& event) OVERRIDE;
 
   // Overridden from internal::RootView:
-  virtual ui::EventResult DispatchGestureEvent(ui::GestureEvent* e) OVERRIDE;
+  virtual void DispatchGestureEvent(ui::GestureEvent* e) OVERRIDE;
 
  private:
   // Returns the MenuController for this MenuHostRootView.
   MenuController* GetMenuController();
 
   // The SubmenuView we contain.
   SubmenuView* submenu_;
 
   // Whether mouse dragged/released should be forwarded to the MenuController.
   bool forward_drag_to_menu_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuHostRootView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_HOST_ROOT_VIEW_H_