Remove #pragma once from chrome/browser/sync

chrome/browser/sync/test/integration/preferences_helper.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_TEST_INTEGRATION_PREFERENCES_HELPER_H_
 #define CHROME_BROWSER_SYNC_TEST_INTEGRATION_PREFERENCES_HELPER_H_
-#pragma once
 
 #include "base/file_path.h"
 #include "base/values.h"
 
 #include <string>
 
 class PrefService;
 
 namespace preferences_helper {
 
@@ skipping 83 matching lines @@
 bool FilePathPrefMatches(const char* pref_name) WARN_UNUSED_RESULT;
 
 // Used to verify that the list preference with name |pref_name| has the
 // same value across all profiles. Also checks |verifier| if DisableVerifier()
 // hasn't been called.
 bool ListPrefMatches(const char* pref_name) WARN_UNUSED_RESULT;
 
 }  // namespace preferences_helper
 
 #endif  // CHROME_BROWSER_SYNC_TEST_INTEGRATION_PREFERENCES_HELPER_H_