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

ui/views/controls/menu/submenu_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_SUBMENU_VIEW_H_
 #define UI_VIEWS_CONTROLS_MENU_SUBMENU_VIEW_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 59 matching lines @@
   virtual void OnDragEntered(const ui::DropTargetEvent& event) OVERRIDE;
   virtual int OnDragUpdated(const ui::DropTargetEvent& event) OVERRIDE;
   virtual void OnDragExited() OVERRIDE;
   virtual int OnPerformDrop(const ui::DropTargetEvent& event) OVERRIDE;
 
   // Scrolls on menu item boundaries.
   virtual bool OnMouseWheel(const ui::MouseWheelEvent& e) OVERRIDE;
 
   // Overridden from ui::EventHandler.
   // Scrolls on menu item boundaries.
-  virtual ui::EventResult OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
+  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
   // Returns true if the menu is showing.
   bool IsShowing();
 
   // Shows the menu at the specified location. Coordinates are in screen
   // coordinates. max_width gives the max width the view should be.
   void ShowAt(Widget* parent,
               const gfx::Rect& bounds,
               bool do_capture);
 
@@ skipping 112 matching lines @@
 
   // The submenu's scroll animator
   scoped_ptr<ScrollAnimator> scroll_animator_;
 
   DISALLOW_COPY_AND_ASSIGN(SubmenuView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_SUBMENU_VIEW_H_