Standardize usage of virtual/override/final in base/

base/message_loop/message_loop.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 BASE_MESSAGE_LOOP_MESSAGE_LOOP_H_
 #define BASE_MESSAGE_LOOP_MESSAGE_LOOP_H_
 
 #include <queue>
 #include <string>
 
@@ skipping 97 matching lines @@
     TYPE_JAVA,
 #endif // defined(OS_ANDROID)
   };
 
   // Normally, it is not necessary to instantiate a MessageLoop.  Instead, it
   // is typical to make use of the current thread's MessageLoop instance.
   explicit MessageLoop(Type type = TYPE_DEFAULT);
   // Creates a TYPE_CUSTOM MessageLoop with the supplied MessagePump, which must
   // be non-NULL.
   explicit MessageLoop(scoped_ptr<base::MessagePump> pump);
-  virtual ~MessageLoop();
+  ~MessageLoop() override;
 
   // Returns the MessageLoop object for the current thread, or null if none.
   static MessageLoop* current();
 
   static void EnableHistogrammer(bool enable_histogrammer);
 
   typedef scoped_ptr<MessagePump> (MessagePumpFactory)();
   // Uses the given base::MessagePumpForUIFactory to override the default
   // MessagePump implementation for 'TYPE_UI'. Returns true if the factory
   // was successfully registered.
@@ skipping 306 matching lines @@
   // Start recording histogram info about events and action IF it was enabled
   // and IF the statistics recorder can accept a registration of our histogram.
   void StartHistogrammer();
 
   // Add occurrence of event to our histogram, so that we can see what is being
   // done in a specific MessageLoop instance (i.e., specific thread).
   // If message_histogram_ is NULL, this is a no-op.
   void HistogramEvent(int event);
 
   // MessagePump::Delegate methods:
-  virtual bool DoWork() override;
-  virtual bool DoDelayedWork(TimeTicks* next_delayed_work_time) override;
-  virtual bool DoIdleWork() override;
+  bool DoWork() override;
+  bool DoDelayedWork(TimeTicks* next_delayed_work_time) override;
+  bool DoIdleWork() override;
 
   const Type type_;
 
   // A list of tasks that need to be processed by this instance.  Note that
   // this queue is only accessed (push/pop) by our current thread.
   TaskQueue work_queue_;
 
   // How many high resolution tasks are in the pending task queue. This value
   // increases by N every time we call ReloadWorkQueue() and decreases by 1
   // every time we call RunTask() if the task needs a high resolution timer.
@@ skipping 189 matching lines @@
 
 // Do not add any member variables to MessageLoopForIO!  This is important b/c
 // MessageLoopForIO is often allocated via MessageLoop(TYPE_IO).  Any extra
 // data that you need should be stored on the MessageLoop's pump_ instance.
 COMPILE_ASSERT(sizeof(MessageLoop) == sizeof(MessageLoopForIO),
                MessageLoopForIO_should_not_have_extra_member_variables);
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_LOOP_MESSAGE_LOOP_H_