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

android_webview/lib/aw_browser_dependency_factory_impl.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 ANDROID_WEBVIEW_LIB_BROWSER_DELEGATE_IMPL_H_
 #define ANDROID_WEBVIEW_LIB_BROWSER_DELEGATE_IMPL_H_
 
 #include "android_webview/native/aw_browser_dependency_factory.h"
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace net {
 class URLRequestContextGetter;
 }
 
 namespace android_webview {
 
 class AwNetworkDelegate;
 class AwURLRequestJobFactory;
 
 class AwBrowserDependencyFactoryImpl : public AwBrowserDependencyFactory {
  public:
   AwBrowserDependencyFactoryImpl();
-  virtual ~AwBrowserDependencyFactoryImpl();
+  ~AwBrowserDependencyFactoryImpl() override;
 
   // Sets this class as the singleton instance.
   static void InstallInstance();
 
   // AwBrowserDependencyFactory
-  virtual content::BrowserContext* GetBrowserContext() override;
-  virtual content::WebContents* CreateWebContents() override;
+  content::BrowserContext* GetBrowserContext() override;
+  content::WebContents* CreateWebContents() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AwBrowserDependencyFactoryImpl);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_LIB_BROWSER_DELEGATE_IMPL_H_