kqueue implementation of FilePathWatcher on Mac.

content/common/file_path_watcher/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 "content/common/file_path_watcher/file_path_watcher.h"
 
 #include "base/logging.h"
 #include "base/message_loop.h"
 
 FilePathWatcher::~FilePathWatcher() {
   impl_->Cancel();
 }
 
-bool FilePathWatcher::Watch(const FilePath& path,
-                            Delegate* delegate,
-                            base::MessageLoopProxy* loop) {
+bool FilePathWatcher::Watch(const FilePath& path, Delegate* delegate) {
   DCHECK(path.IsAbsolute());
-  return impl_->Watch(path, delegate, loop);
+  return impl_->Watch(path, delegate);
 }
 
 FilePathWatcher::PlatformDelegate::PlatformDelegate(): cancelled_(false) {
 }
 
 FilePathWatcher::PlatformDelegate::~PlatformDelegate() {
   DCHECK(is_cancelled());
 }