Remove #pragma once from sync

sync/notifier/chrome_invalidation_client.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.
 //
 // A simple wrapper around invalidation::InvalidationClient that
 // handles all the startup/shutdown details and hookups.
 
 #ifndef SYNC_NOTIFIER_CHROME_INVALIDATION_CLIENT_H_
 #define SYNC_NOTIFIER_CHROME_INVALIDATION_CLIENT_H_
-#pragma once
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/non_thread_safe.h"
 #include "google/cacheinvalidation/include/invalidation-listener.h"
@@ skipping 131 matching lines @@
   // NO_NOTIFICATION_ERROR meaning notifications are enabled).
   NotificationsDisabledReason ticl_state_;
   NotificationsDisabledReason push_client_state_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeInvalidationClient);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_NOTIFIER_CHROME_INVALIDATION_CLIENT_H_