Remove #pragma once from chrome/browser/policy

chrome/browser/policy/user_policy_token_cache.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_POLICY_USER_POLICY_TOKEN_CACHE_H_
 #define CHROME_BROWSER_POLICY_USER_POLICY_TOKEN_CACHE_H_
-#pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/policy/cloud_policy_data_store.h"
 
 namespace policy {
@@ skipping 64 matching lines @@
   // The current token in the cache. Upon new token notifications, we compare
   // against this in order to avoid writing the file when there's no change.
   std::string token_;
 
   DISALLOW_COPY_AND_ASSIGN(UserPolicyTokenCache);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_USER_POLICY_TOKEN_CACHE_H_