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

content/browser/android/download_controller_android_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.
 
 // This class pairs with DownloadController on Java side to forward requests
 // for GET downloads to the current DownloadListener. POST downloads are
 // handled on the native side.
 //
 // Both classes are Singleton classes. C++ object owns Java object.
 //
@@ skipping 55 matching lines @@
     std::string cookie;
     std::string referer;
     bool has_user_gesture;
 
     WebContents* web_contents;
     // Default copy constructor is used for passing this struct by value.
   };
   struct JavaObject;
   friend struct DefaultSingletonTraits<DownloadControllerAndroidImpl>;
   DownloadControllerAndroidImpl();
-  virtual ~DownloadControllerAndroidImpl();
+  ~DownloadControllerAndroidImpl() override;
 
   // DownloadControllerAndroid implementation.
-  virtual void CreateGETDownload(int render_process_id, int render_view_id,
-                                 int request_id) override;
-  virtual void OnDownloadStarted(DownloadItem* download_item) override;
-  virtual void StartContextMenuDownload(
-      const ContextMenuParams& params, WebContents* web_contents,
-      bool is_link) override;
-  virtual void DangerousDownloadValidated(
-      WebContents* web_contents, int download_id, bool accept) override;
+  void CreateGETDownload(int render_process_id,
+                         int render_view_id,
+                         int request_id) override;
+  void OnDownloadStarted(DownloadItem* download_item) override;
+  void StartContextMenuDownload(const ContextMenuParams& params,
+                                WebContents* web_contents,
+                                bool is_link) override;
+  void DangerousDownloadValidated(WebContents* web_contents,
+                                  int download_id,
+                                  bool accept) override;
 
   // DownloadItem::Observer interface.
-  virtual void OnDownloadUpdated(DownloadItem* item) override;
+  void OnDownloadUpdated(DownloadItem* item) override;
 
   typedef base::Callback<void(const DownloadInfoAndroid&)>
       GetDownloadInfoCB;
   void PrepareDownloadInfo(const GlobalRequestID& global_id,
                            const GetDownloadInfoCB& callback);
   void CheckPolicyAndLoadCookies(const DownloadInfoAndroid& info,
                                  const GetDownloadInfoCB& callback,
                                  const GlobalRequestID& global_id,
                                  const net::CookieList& cookie_list);
   void DoLoadCookies(const DownloadInfoAndroid& info,
@@ skipping 21 matching lines @@
   JavaObject* GetJavaObject();
 
   JavaObject* java_object_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadControllerAndroidImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_ANDROID_IMPL_H_