Update {virtual,override} to follow C++11 style in chrome.

chrome/browser/ui/views/panels/panel_stack_view.h

 // Copyright (c) 2013 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_PANELS_PANEL_STACK_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_PANELS_PANEL_STACK_VIEW_H_
 
 #include <list>
 #include <map>
 #include "base/basictypes.h"
@@ skipping 76 matching lines @@
   void EnsureWindowCreated();
 
   // Makes the stack window own the panel window such that multiple panels
   // stacked together could appear as a single window on the taskbar or
   // launcher.
   static void MakeStackWindowOwnPanelWindow(Panel* panel,
                                             PanelStackView* stack_window);
 
 #if defined(OS_WIN)
   // Overridden from ui::HWNDMessageFilter:
-  virtual bool FilterMessage(HWND hwnd,
-                             UINT message,
-                             WPARAM w_param,
-                             LPARAM l_param,
-                             LRESULT* l_result) override;
+  bool FilterMessage(HWND hwnd,
+                     UINT message,
+                     WPARAM w_param,
+                     LPARAM l_param,
+                     LRESULT* l_result) override;
 
   // Overridden from TaskbarWindowThumbnailerDelegateWin:
-  virtual std::vector<HWND> GetSnapshotWindowHandles() const override;
+  std::vector<HWND> GetSnapshotWindowHandles() const override;
 
   // Updates the live preview snapshot when something changes, like
   // adding/removing/moving/resizing a stacked panel.
   void RefreshLivePreviewThumbnail();
 
   // Updates the bounds of the widget window in a deferred way.
   void DeferUpdateNativeWindowBounds(HDWP defer_window_pos_info,
                                      views::Widget* window,
                                      const gfx::Rect& bounds);
 #endif
@@ skipping 21 matching lines @@
   bool bounds_updates_started_;
   BoundsUpdates bounds_updates_;
 
   // Used to animate the bounds changes at a synchronized pace.
   scoped_ptr<gfx::LinearAnimation> bounds_animator_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelStackView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PANELS_PANEL_STACK_VIEW_H_