Remove #pragma once from sync

sync/js/sync_js_controller.h

 // Copyright (c) 2012 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.
 
 #ifndef SYNC_JS_SYNC_JS_CONTROLLER_H_
 #define SYNC_JS_SYNC_JS_CONTROLLER_H_
-#pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "sync/internal_api/public/util/weak_handle.h"
 #include "sync/js/js_arg_list.h"
@@ skipping 54 matching lines @@
   WeakHandle<JsBackend> js_backend_;
   ObserverList<JsEventHandler> js_event_handlers_;
   PendingJsMessageList pending_js_messages_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncJsController);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_JS_SYNC_JS_CONTROLLER_H_