Remove #pragma once from chrome/browser/policy

chrome/browser/policy/configuration_policy_provider.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_CONFIGURATION_POLICY_PROVIDER_H_
 #define CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PROVIDER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "chrome/browser/policy/policy_bundle.h"
 
 namespace policy {
 
 // A mostly-abstract super class for platform-specific policy providers.
 // Platform-specific policy providers (Windows Group Policy, gconf,
@@ skipping 69 matching lines @@
  private:
   ConfigurationPolicyProvider* provider_;
   ConfigurationPolicyProvider::Observer* observer_;
 
   DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyObserverRegistrar);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PROVIDER_H_