Remove #pragma once from chrome/browser/policy

chrome/browser/policy/device_policy_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_DEVICE_POLICY_CACHE_H_
 #define CHROME_BROWSER_POLICY_DEVICE_POLICY_CACHE_H_
-#pragma once
 
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/chromeos/login/signed_settings.h"
 #include "chrome/browser/policy/cloud_policy_cache_base.h"
 #include "chrome/browser/policy/proto/chrome_device_policy.pb.h"
 
 namespace chromeos {
 class SignedSettingsHelper;
 }  // namespace chromeos
 
@@ skipping 95 matching lines @@
   base::WeakPtrFactory<DevicePolicyCache> weak_ptr_factory_;
 
   bool policy_fetch_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(DevicePolicyCache);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_DEVICE_POLICY_CACHE_H_