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

chrome/browser/ui/views/tabs/tab_strip.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 CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 217 matching lines @@
   // View overrides.
   virtual const views::View* GetViewByID(int id) const OVERRIDE;
   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 OnMouseCaptureLost() OVERRIDE;
   virtual void OnMouseMoved(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseEntered(const ui::MouseEvent& event) OVERRIDE;
 
   // ui::EventHandler overrides.
-  virtual ui::EventResult OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
+  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
  private:
   typedef std::map<int, std::vector<Tab*> > TabsClosingMap;
 
   class RemoveTabDelegate;
 
   friend class TabDragController;
   friend class TabDragControllerTest;
 
   // Used during a drop session of a url. Tracks the position of the drop as
@@ skipping 345 matching lines @@
   // tab close comes from a touch device.
   base::OneShotTimer<TabStrip> resize_layout_timer_;
 
   // True if tabs are painted as rectangular light-bars.
   bool immersive_style_;
 
   DISALLOW_COPY_AND_ASSIGN(TabStrip);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_