Remove #pragma once from chrome/browser/sync

chrome/browser/sync/test/integration/sync_extension_helper.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 CHROME_BROWSER_SYNC_TEST_INTEGRATION_SYNC_EXTENSION_HELPER_H_
 #define CHROME_BROWSER_SYNC_TEST_INTEGRATION_SYNC_EXTENSION_HELPER_H_
-#pragma once
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
 #include "chrome/common/extensions/extension.h"
@@ skipping 100 matching lines @@
       extensions::Extension::Type type) WARN_UNUSED_RESULT;
 
   ProfileExtensionNameMap profile_extensions_;
   StringMap id_to_name_;
   bool setup_completed_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncExtensionHelper);
 };
 
 #endif  // CHROME_BROWSER_SYNC_TEST_INTEGRATION_SYNC_EXTENSION_HELPER_H_