Remove #pragma once from chrome/browser/policy

chrome/browser/policy/user_policy_disk_cache.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_POLICY_USER_POLICY_DISK_CACHE_H_
 #define CHROME_BROWSER_POLICY_USER_POLICY_DISK_CACHE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 
 namespace enterprise_management {
 class CachedCloudPolicyResponse;
 }
 
@@ skipping 59 matching lines @@
 
   base::WeakPtr<Delegate> delegate_;
   const FilePath backing_file_path_;
 
   DISALLOW_COPY_AND_ASSIGN(UserPolicyDiskCache);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_USER_POLICY_DISK_CACHE_H_