Move FilePathWatcher to base/files.

chrome/browser/user_style_sheet_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.
 
 #include "chrome/browser/user_style_sheet_watcher.h"
 
 #include "base/base64.h"
 #include "base/file_util.h"
 #include "content/common/notification_service.h"
 #include "content/common/notification_type.h"
 
+using ::base::files::FilePathWatcher;
+
 namespace {
 
 // The subdirectory of the profile that contains the style sheet.
 const char kStyleSheetDir[] = "User StyleSheets";
 // The filename of the stylesheet.
 const char kUserStyleSheetFile[] = "Custom.css";
 
 }  // namespace
 
 // UserStyleSheetLoader is responsible for loading  the user style sheet on the
@@ skipping 138 matching lines @@
 GURL UserStyleSheetWatcher::user_style_sheet() const {
   return loader_->user_style_sheet();
 }
 
 void UserStyleSheetWatcher::Observe(NotificationType type,
     const NotificationSource& source, const NotificationDetails& details) {
   DCHECK(type == NotificationType::RENDER_VIEW_HOST_CREATED_FOR_TAB);
   loader_->NotifyLoaded();
   registrar_.RemoveAll();
 }