Standardize usage of virtual/override/final in content/

content/child/fileapi/webfilesystem_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 CONTENT_CHILD_FILEAPI_WEBFILESYSTEM_IMPL_H_
 #define CONTENT_CHILD_FILEAPI_WEBFILESYSTEM_IMPL_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 30 matching lines @@
 
   // Deletes thread-specific instance (if exists). For workers it deletes
   // itself in OnWorkerRunLoopStopped(), but for an instance created on the
   // main thread this method must be called.
   static void DeleteThreadSpecificInstance();
 
   explicit WebFileSystemImpl(base::MessageLoopProxy* main_thread_loop);
   virtual ~WebFileSystemImpl();
 
   // WorkerTaskRunner::Observer implementation.
-  virtual void OnWorkerRunLoopStopped() override;
+  void OnWorkerRunLoopStopped() override;
 
   // WebFileSystem implementation.
   virtual void openFileSystem(
       const blink::WebURL& storage_partition,
       const blink::WebFileSystemType type,
       blink::WebFileSystemCallbacks);
   virtual void resolveURL(
       const blink::WebURL& filesystem_url,
       blink::WebFileSystemCallbacks) override;
   virtual void deleteFileSystem(
@@ skipping 60 matching lines @@
   CallbacksMap callbacks_;
   int next_callbacks_id_;
   WaitableCallbackResultsMap waitable_results_;
 
   DISALLOW_COPY_AND_ASSIGN(WebFileSystemImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_FILEAPI_WEBFILESYSTEM_IMPL_H_