Remove #pragma once from chrome/browser/policy

chrome/browser/policy/mock_cloud_policy_data_store.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_MOCK_CLOUD_POLICY_DATA_STORE_H_
 #define CHROME_BROWSER_POLICY_MOCK_CLOUD_POLICY_DATA_STORE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "chrome/browser/policy/cloud_policy_data_store.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace policy {
 
 class MockCloudPolicyDataStoreObserver : public CloudPolicyDataStore::Observer {
  public:
   MockCloudPolicyDataStoreObserver();
   virtual ~MockCloudPolicyDataStoreObserver();
 
   MOCK_METHOD0(OnDeviceTokenChanged, void());
   MOCK_METHOD0(OnCredentialsChanged, void());
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockCloudPolicyDataStoreObserver);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_MOCK_CLOUD_POLICY_DATA_STORE_H_