Standardize usage of virtual/override/final in content/

content/child/quota_message_filter.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_QUOTA_MESSAGE_FILTER_H_
 #define CONTENT_CHILD_QUOTA_MESSAGE_FILTER_H_
 
 #include <map>
 
 #include "base/memory/ref_counted.h"
@@ skipping 14 matching lines @@
 
   // Generates a new request_id, registers { request_id, thread_id } map to
   // the message filter and returns the request_id.
   // This method can be called on any thread.
   int GenerateRequestID(int thread_id);
 
   // Clears all requests from the thread_id.
   void ClearThreadRequests(int thread_id);
 
  protected:
-  virtual ~QuotaMessageFilter();
+  ~QuotaMessageFilter() override;
 
  private:
   // ChildMessageFilter implementation:
-  virtual base::TaskRunner* OverrideTaskRunnerForMessage(
+  base::TaskRunner* OverrideTaskRunnerForMessage(
       const IPC::Message& msg) override;
-  virtual bool OnMessageReceived(const IPC::Message& msg) override;
+  bool OnMessageReceived(const IPC::Message& msg) override;
 
   typedef std::map<int, int> RequestIdToThreadId;
 
   scoped_refptr<base::MessageLoopProxy> main_thread_loop_proxy_;
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
 
   base::Lock request_id_map_lock_;
   RequestIdToThreadId request_id_map_;
   int next_request_id_;
 
   DISALLOW_COPY_AND_ASSIGN(QuotaMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_QUOTA_MESSAGE_FILTER_H_