Move FilePathWatcher to base/files.

base/files/file_path_watcher.h

 // 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.
 
 // This module provides a way to monitor a file or directory for changes.
 
-#ifndef CONTENT_COMMON_FILE_PATH_WATCHER_FILE_PATH_WATCHER_H_
-#define CONTENT_COMMON_FILE_PATH_WATCHER_FILE_PATH_WATCHER_H_
+#ifndef BASE_FILES_FILE_PATH_WATCHER_H_
+#define BASE_FILES_FILE_PATH_WATCHER_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop_proxy.h"
 
+namespace base {
+namespace files {
+
 // This class lets you register interest in changes on a FilePath.
 // The delegate will get called whenever the file or directory referenced by the
 // FilePath is changed, including created or deleted. Due to limitations in the
 // underlying OS APIs, FilePathWatcher has slightly different semantics on OS X
 // than on Windows or Linux. FilePathWatcher on Linux and Windows will detect
 // modifications to files in a watched directory. FilePathWatcher on Mac will
 // detect the creation and deletion of files in a watched directory, but will
 // not detect modifications to those files. See file_path_watcher_mac.cc for
 // details.
 class FilePathWatcher {
@@ skipping 86 matching lines @@
     scoped_refptr<base::MessageLoopProxy> message_loop_;
     bool cancelled_;
   };
 
  private:
   scoped_refptr<PlatformDelegate> impl_;
 
   DISALLOW_COPY_AND_ASSIGN(FilePathWatcher);
 };
 
-#endif  // CONTENT_COMMON_FILE_PATH_WATCHER_FILE_PATH_WATCHER_H_
+}  // namespace files
+}  // namespace base
+
+#endif  // BASE_FILES_FILE_PATH_WATCHER_H_