Standardize usage of virtual/override/final in content/

content/child/child_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_CROSS_MESSAGE_FILTER_H_
 #define CONTENT_CHILD_CROSS_MESSAGE_FILTER_H_
 
 #include "base/memory/ref_counted.h"
 #include "ipc/ipc_sender.h"
 
 namespace base {
 class TaskRunner;
 }
 
 namespace IPC {
 class MessageFilter;
 }
 
 namespace content {
 
 class ThreadSafeSender;
 
 // A base class for implementing IPC MessageFilter's that run on a different
 // thread or TaskRunner than the main thread.
 class ChildMessageFilter
     : public base::RefCountedThreadSafe<ChildMessageFilter>,
       public IPC::Sender {
  public:
   // IPC::Sender implementation. Can be called on any threads.
-  virtual bool Send(IPC::Message* message) override;
+  bool Send(IPC::Message* message) override;
 
   // If implementers want to run OnMessageReceived on a different task
   // runner it should override this and return the TaskRunner for the message.
   // Returning NULL runs OnMessageReceived() on the current IPC thread.
   virtual base::TaskRunner* OverrideTaskRunnerForMessage(
       const IPC::Message& msg) = 0;
 
   // If OverrideTaskRunnerForMessage is overriden and returns non-null
   // this will be called on the returned TaskRunner.
   virtual bool OnMessageReceived(const IPC::Message& msg) = 0;
 
   // This method is called when WorkerTaskRunner::PostTask() returned false
   // for the target thread.  Note that there's still a little chance that
   // PostTask() returns true but OnMessageReceived() is never called on the
   // target thread.  By default this does nothing.
   virtual void OnStaleMessageReceived(const IPC::Message& msg) {}
 
  protected:
   ChildMessageFilter();
-  virtual ~ChildMessageFilter();
+  ~ChildMessageFilter() override;
 
  private:
   class Internal;
   friend class ChildThread;
   friend class RenderThreadImpl;
   friend class WorkerThread;
 
   friend class base::RefCountedThreadSafe<ChildMessageFilter>;
 
   IPC::MessageFilter* GetFilter();
 
   // This implements IPC::MessageFilter to hide the actual filter methods from
   // child classes.
   Internal* internal_;
 
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_CROSS_MESSAGE_FILTER_H_