replace OVERRIDE and FINAL with override and final in base/

base/files/file_path_watcher_stub.cc

Index: base/files/file_path_watcher_stub.cc
diff --git a/base/files/file_path_watcher_stub.cc b/base/files/file_path_watcher_stub.cc
index afca0dab96b0224911be8d6e53d5d2ec11b4bc57..d7ad2066aab8dbbc449b3154488df2d46fc42cb2 100644
--- a/base/files/file_path_watcher_stub.cc
+++ b/base/files/file_path_watcher_stub.cc
@@ -15,13 +15,13 @@ class FilePathWatcherImpl : public FilePathWatcher::PlatformDelegate {
  public:
   virtual bool Watch(const FilePath& path,
                      bool recursive,
-                     const FilePathWatcher::Callback& callback) OVERRIDE {
+                     const FilePathWatcher::Callback& callback) override {
     return false;
   }
 
-  virtual void Cancel() OVERRIDE {}
+  virtual void Cancel() override {}
 
-  virtual void CancelOnMessageLoopThread() OVERRIDE {}
+  virtual void CancelOnMessageLoopThread() override {}
 
  protected:
   virtual ~FilePathWatcherImpl() {}