Remove #pragma once from chrome/browser/sync

chrome/browser/sync/glue/chrome_encryptor.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_GLUE_CHROME_ENCRYPTOR_H_
 #define CHROME_BROWSER_SYNC_GLUE_CHROME_ENCRYPTOR_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "sync/util/encryptor.h"
 
 namespace browser_sync {
 
 // Encryptor that uses the Chrome password manager's encryptor.
 class ChromeEncryptor : public syncer::Encryptor {
  public:
   virtual ~ChromeEncryptor();
 
   virtual bool EncryptString(const std::string& plaintext,
                              std::string* ciphertext) OVERRIDE;
 
   virtual bool DecryptString(const std::string& ciphertext,
                              std::string* plaintext) OVERRIDE;
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_CHROME_ENCRYPTOR_H_