replace OVERRIDE and FINAL with override and final in base/

base/files/file_path_watcher_linux.cc

Index: base/files/file_path_watcher_linux.cc
diff --git a/base/files/file_path_watcher_linux.cc b/base/files/file_path_watcher_linux.cc
index d5d664e202a117b7f10aacb1446a9b091b4a9f93..fb5ba6202ae29a8266d9d1685e1d29f15af06b9c 100644
--- a/base/files/file_path_watcher_linux.cc
+++ b/base/files/file_path_watcher_linux.cc
@@ -112,18 +112,18 @@ class FilePathWatcherImpl : public FilePathWatcher::PlatformDelegate,
   // Returns true if watch for |path| has been added successfully.
   virtual bool Watch(const FilePath& path,
                      bool recursive,
-                     const FilePathWatcher::Callback& callback) OVERRIDE;
+                     const FilePathWatcher::Callback& callback) override;
 
   // Cancel the watch. This unregisters the instance with InotifyReader.
-  virtual void Cancel() OVERRIDE;
+  virtual void Cancel() override;
 
   // Cleans up and stops observing the message_loop() thread.
-  virtual void CancelOnMessageLoopThread() OVERRIDE;
+  virtual void CancelOnMessageLoopThread() override;
 
   // Deletion of the FilePathWatcher will call Cancel() to dispose of this
   // object in the right thread. This also observes destruction of the required
   // cleanup thread, in case it quits before Cancel() is called.
-  virtual void WillDestroyCurrentMessageLoop() OVERRIDE;
+  virtual void WillDestroyCurrentMessageLoop() override;
 
   // Inotify watches are installed for all directory components of |target_|. A
   // WatchEntry instance holds the watch descriptor for a component and the