Remove #pragma once from chrome/service

chrome/service/cloud_print/cloud_print_helpers.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_SERVICE_CLOUD_PRINT_CLOUD_PRINT_HELPERS_H_
 #define CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_HELPERS_H_
-#pragma once
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "chrome/service/cloud_print/print_system.h"
 #include "googleurl/src/gurl.h"
 
 namespace base {
 class DictionaryValue;
@@ skipping 40 matching lines @@
   // Created CloudPrint auth header from the auth token stored in the store.
   static std::string GetCloudPrintAuthHeaderFromStore();
   // Created CloudPrint auth header from the auth token.
   static std::string GetCloudPrintAuthHeader(const std::string& auth_token);
 
  private:
   CloudPrintHelpers() {}
 };
 
 #endif  // CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_HELPERS_H_