Update from https://crrev.com/327068

base/files/file_path_watcher_win.cc

Index: base/files/file_path_watcher_win.cc
diff --git a/base/files/file_path_watcher_win.cc b/base/files/file_path_watcher_win.cc
index f6d002949e4c205c5a40b26bfad85f7e27f817c1..d7ce5248a3a372f9d9fc0349e78174c994871776 100644
--- a/base/files/file_path_watcher_win.cc
+++ b/base/files/file_path_watcher_win.cc
@@ -27,21 +27,21 @@ class FilePathWatcherImpl : public FilePathWatcher::PlatformDelegate,
         recursive_watch_(false) {}
 
   // FilePathWatcher::PlatformDelegate overrides.
-  virtual bool Watch(const FilePath& path,
-                     bool recursive,
-                     const FilePathWatcher::Callback& callback) override;
-  virtual void Cancel() override;
+  bool Watch(const FilePath& path,
+             bool recursive,
+             const FilePathWatcher::Callback& callback) override;
+  void Cancel() 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;
+  void WillDestroyCurrentMessageLoop() override;
 
   // Callback from MessageLoopForIO.
-  virtual void OnObjectSignaled(HANDLE object) override;
+  void OnObjectSignaled(HANDLE object) override;
 
  private:
-  virtual ~FilePathWatcherImpl() {}
+  ~FilePathWatcherImpl() override {}
 
   // Setup a watch handle for directory |dir|. Set |recursive| to true to watch
   // the directory sub trees. Returns true if no fatal error occurs. |handle|