Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/management_policy.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_EXTENSIONS_MANAGEMENT_POLICY_H_
 #define CHROME_BROWSER_EXTENSIONS_MANAGEMENT_POLICY_H_
-#pragma once
 
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "chrome/common/extensions/extension.h"
 
 namespace extensions {
 
 // This class registers providers that want to prohibit certain actions from
@@ skipping 87 matching lines @@
  private:
   typedef std::set<Provider*> ProviderList;
   ProviderList providers_;
 
   DISALLOW_COPY_AND_ASSIGN(ManagementPolicy);
 };
 
 }  // namespace
 
 #endif  // CHROME_BROWSER_EXTENSIONS_MANAGEMENT_POLICY_H_