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

chrome/browser/ui/views/status_icons/status_tray_win.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_STATUS_ICONS_STATUS_TRAY_WIN_H_
 #define CHROME_BROWSER_UI_VIEWS_STATUS_ICONS_STATUS_TRAY_WIN_H_
 
 #include <windows.h>
 
 #include "base/compiler_specific.h"
@@ skipping 10 matching lines @@
   virtual ~StatusTrayStateChangerProxy() {}
 
   // Called by StatusTrayWin to request upgraded visibility on the icon
   // represented by the |icon_id|, |window| pair.
   virtual void EnqueueChange(UINT icon_id, HWND window) = 0;
 };
 
 class StatusTrayWin : public StatusTray {
  public:
   StatusTrayWin();
-  ~StatusTrayWin();
+  ~StatusTrayWin() override;
 
   void UpdateIconVisibilityInBackground(StatusIconWin* status_icon);
 
   // Exposed for testing.
   LRESULT CALLBACK
       WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);
 
  protected:
   // Overriden from StatusTray:
-  virtual StatusIcon* CreatePlatformStatusIcon(StatusIconType type,
-                                               const gfx::ImageSkia& image,
-                                               const base::string16& tool_tip)
-      override;
+  StatusIcon* CreatePlatformStatusIcon(StatusIconType type,
+                                       const gfx::ImageSkia& image,
+                                       const base::string16& tool_tip) override;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(StatusTrayWinTest, EnsureVisibleTest);
 
   // Static callback invoked when a message comes in to our messaging window.
   static LRESULT CALLBACK
       WndProcStatic(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);
 
   UINT NextIconId();
 
@@ skipping 18 matching lines @@
 
   // Manages changes performed on a background thread to manipulate visibility
   // of notification icons.
   scoped_ptr<StatusTrayStateChangerProxy> state_changer_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(StatusTrayWin);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_STATUS_ICONS_STATUS_TRAY_WIN_H_