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

chrome/browser/plugins/plugin_infobar_delegates.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_PLUGINS_PLUGIN_INFOBAR_DELEGATES_H_
 #define CHROME_BROWSER_PLUGINS_PLUGIN_INFOBAR_DELEGATES_H_
 
 #include "base/callback.h"
 #include "components/infobars/core/confirm_infobar_delegate.h"
 #include "url/gurl.h"
@@ skipping 99 matching lines @@
   };
 
   // Creates a metro mode infobar and delegate and adds the infobar to
   // |infobar_service|.
   static void Create(InfoBarService* infobar_service,
                      Mode mode,
                      const base::string16& name);
 
  private:
   PluginMetroModeInfoBarDelegate(Mode mode, const base::string16& name);
-  virtual ~PluginMetroModeInfoBarDelegate();
+  ~PluginMetroModeInfoBarDelegate() override;
 
   // ConfirmInfoBarDelegate:
-  virtual int GetIconID() const override;
-  virtual base::string16 GetMessageText() const override;
-  virtual int GetButtons() const override;
-  virtual base::string16 GetButtonLabel(InfoBarButton button) const override;
-  virtual bool Accept() override;
-  virtual base::string16 GetLinkText() const override;
-  virtual bool LinkClicked(WindowOpenDisposition disposition) override;
+  int GetIconID() const override;
+  base::string16 GetMessageText() const override;
+  int GetButtons() const override;
+  base::string16 GetButtonLabel(InfoBarButton button) const override;
+  bool Accept() override;
+  base::string16 GetLinkText() const override;
+  bool LinkClicked(WindowOpenDisposition disposition) override;
 
   const Mode mode_;
   const base::string16 name_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginMetroModeInfoBarDelegate);
 };
 #endif  // defined(OS_WIN)
 
 #endif  // CHROME_BROWSER_PLUGINS_PLUGIN_INFOBAR_DELEGATES_H_