Standardize usage of virtual/override/final in chrome/browser/

chrome/browser/metrics/thread_watcher.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 file defines a WatchDog thread that monitors the responsiveness of other
 // browser threads like UI, IO, DB, FILE and CACHED threads. It also defines
 // ThreadWatcher class which performs health check on threads that would like to
 // be watched. This file also defines ThreadWatcherList class that has list of
 // all active ThreadWatcher objects.
 //
@@ skipping 502 matching lines @@
 
   // Removes all ints from |registrar_| and deletes
   // |g_thread_watcher_observer_|. This method is accessible on UI thread.
   static void RemoveNotifications();
 
  private:
   // Constructor of |g_thread_watcher_observer_| singleton.
   explicit ThreadWatcherObserver(const base::TimeDelta& wakeup_interval);
 
   // Destructor of |g_thread_watcher_observer_| singleton.
-  virtual ~ThreadWatcherObserver();
+  ~ThreadWatcherObserver() override;
 
   // This ensures all thread watchers are active because there is some user
   // activity. It will wake up all thread watchers every |wakeup_interval_|
   // seconds. This is the implementation of content::NotificationObserver. When
   // a matching notification is posted to the notification service, this method
   // is called.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) override;
+  void Observe(int type,
+               const content::NotificationSource& source,
+               const content::NotificationDetails& details) override;
 
   // The singleton of this class.
   static ThreadWatcherObserver* g_thread_watcher_observer_;
 
   // The registrar that holds ints to be observed.
   content::NotificationRegistrar registrar_;
 
   // This is the last time when woke all thread watchers up.
   base::TimeTicks last_wakeup_time_;
 
   // It is the time interval between wake up calls to thread watchers.
   const base::TimeDelta wakeup_interval_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadWatcherObserver);
 };
 
 // Class for WatchDogThread and in its Init method, we start watching UI, IO,
 // DB, FILE, CACHED threads.
 class WatchDogThread : public base::Thread {
  public:
   // Constructor.
   WatchDogThread();
 
   // Destroys the thread and stops the thread.
-  virtual ~WatchDogThread();
+  ~WatchDogThread() override;
 
   // Callable on any thread.  Returns whether you're currently on a
   // WatchDogThread.
   static bool CurrentlyOnWatchDogThread();
 
   // These are the same methods in message_loop.h, but are guaranteed to either
   // get posted to the MessageLoop if it's still alive, or be deleted otherwise.
   // They return true iff the watchdog thread existed and the task was posted.
   // Note that even if the task is posted, there's no guarantee that it will
   // run, since the target thread may already have a Quit message in its queue.
   static bool PostTask(const tracked_objects::Location& from_here,
                        const base::Closure& task);
   static bool PostDelayedTask(const tracked_objects::Location& from_here,
                               const base::Closure& task,
                               base::TimeDelta delay);
 
  protected:
-  virtual void Init() override;
-  virtual void CleanUp() override;
+  void Init() override;
+  void CleanUp() override;
 
  private:
   static bool PostTaskHelper(
       const tracked_objects::Location& from_here,
       const base::Closure& task,
       base::TimeDelta delay);
 
   DISALLOW_COPY_AND_ASSIGN(WatchDogThread);
 };
 
@@ skipping 54 matching lines @@
   // shutdown_watchdog_ watches for hangs during shutdown.
   base::Watchdog* shutdown_watchdog_;
 
   // The |thread_id_| on which this object is constructed.
   const base::PlatformThreadId thread_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ShutdownWatcherHelper);
 };
 
 #endif  // CHROME_BROWSER_METRICS_THREAD_WATCHER_H_