Move FilePathWatcher to base/files.

base/files/file_path_watcher_mac.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.
 
-#include "content/common/file_path_watcher/file_path_watcher.h"
+#include "base/files/file_path_watcher.h"
 
 #include <fcntl.h>
 #include <sys/event.h>
 #include <sys/param.h>
 
 #include <vector>
 
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
 #include "base/stringprintf.h"
 
+using ::base::files::FilePathWatcher;
+
 namespace {
 
 // Mac-specific file watcher implementation based on kqueue.
 // Originally it was based on FSEvents so that the semantics were equivalent
 // on Linux, OSX and Windows where it was able to detect:
 // - file creation/deletion/modification in a watched directory
 // - file creation/deletion/modification for a watched file
 // - modifications to the paths to a watched object that would affect the
 //   object such as renaming/attibute changes etc.
 // The FSEvents version did all of the above except handling attribute changes
@@ skipping 450 matching lines @@
     MessageLoop::current()->RemoveDestructionObserver(this);
     delegate_ = NULL;
   }
 }
 
 }  // namespace
 
 FilePathWatcher::FilePathWatcher() {
   impl_ = new FilePathWatcherImpl();
 }