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

chrome/browser/ui/views/status_icons/status_tray_win.cc

 // 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.
 
 #include "chrome/browser/ui/views/status_icons/status_tray_win.h"
 
 #include <commctrl.h>
 
 #include "base/bind.h"
 #include "base/profiler/scoped_tracker.h"
@@ skipping 52 matching lines @@
 class StatusTrayStateChangerProxyImpl : public StatusTrayStateChangerProxy,
                                         public base::NonThreadSafe {
  public:
   StatusTrayStateChangerProxyImpl()
       : pending_requests_(0),
         worker_thread_("StatusIconCOMWorkerThread"),
         weak_factory_(this) {
     worker_thread_.init_com_with_mta(false);
   }
 
-  virtual void EnqueueChange(UINT icon_id, HWND window) override {
+  void EnqueueChange(UINT icon_id, HWND window) override {
     DCHECK(CalledOnValidThread());
     if (pending_requests_ == 0)
       worker_thread_.Start();
 
     ++pending_requests_;
     worker_thread_.message_loop_proxy()->PostTaskAndReply(
         FROM_HERE,
         base::Bind(
             &StatusTrayStateChangerProxyImpl::EnqueueChangeOnWorkerThread,
             icon_id,
@@ skipping 176 matching lines @@
 }
 
 void StatusTrayWin::SetStatusTrayStateChangerProxyForTest(
     scoped_ptr<StatusTrayStateChangerProxy> proxy) {
   state_changer_proxy_ = proxy.Pass();
 }
 
 StatusTray* StatusTray::Create() {
   return new StatusTrayWin();
 }