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

android_webview/native/aw_web_preferences_populater_impl.h

 // Copyright 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 ANDROID_WEBVIEW_NATIVE_AW_WEB_PREFERENCES_POPULATER_IMPL_H_
 #define ANDROID_WEBVIEW_NATIVE_AW_WEB_PREFERENCES_POPULATER_IMPL_H_
 
 #include "android_webview/browser/aw_web_preferences_populater.h"
 #include "base/compiler_specific.h"
 
 namespace android_webview {
 
 class AwSettings;
 
 class AwWebPreferencesPopulaterImpl : public AwWebPreferencesPopulater {
  public:
   AwWebPreferencesPopulaterImpl();
-  virtual ~AwWebPreferencesPopulaterImpl();
+  ~AwWebPreferencesPopulaterImpl() override;
 
   // AwWebPreferencesPopulater
-  virtual void PopulateFor(content::WebContents* web_contents,
-                           content::WebPreferences* web_prefs) override;
+  void PopulateFor(content::WebContents* web_contents,
+                   content::WebPreferences* web_prefs) override;
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_NATIVE_AW_WEB_PREFERENCES_POPULATER_IMPL_H_