FilePathWatcher::Watch() - Listen for sub directory changes.

base/files/file_path_watcher.cc

 // Copyright (c) 2011 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.
 
 // Cross platform methods for FilePathWatcher. See the various platform
 // specific implementation files, too.
 
 #include "base/files/file_path_watcher.h"
 
 #include "base/logging.h"
@@ skipping 34 matching lines @@
 }
 
 // static
 void FilePathWatcher::CancelWatch(
     const scoped_refptr<PlatformDelegate>& delegate) {
   delegate->CancelOnMessageLoopThread();
 }
 
 bool FilePathWatcher::Watch(const FilePath& path, Delegate* delegate) {
   DCHECK(path.IsAbsolute());
-  return impl_->Watch(path, delegate);
+  return impl_->Watch(path, false, delegate);
 }
 
 FilePathWatcher::PlatformDelegate::PlatformDelegate(): cancelled_(false) {
 }
 
 FilePathWatcher::PlatformDelegate::~PlatformDelegate() {
   DCHECK(is_cancelled());
 }
 
-bool FilePathWatcher::Watch(const FilePath& path, const Callback& callback) {
-  return Watch(path, new FilePathWatcherDelegate(callback));
+bool FilePathWatcher::Watch(const FilePath& path,
+                            bool recursive,
+                            const Callback& callback) {
+  DCHECK(path.IsAbsolute());
+  return impl_->Watch(path, recursive, new FilePathWatcherDelegate(callback));
 }
 
 }  // namespace files
 }  // namespace base