Cosmetic cleanups in chrome/browser/policy/

chrome/browser/policy/cloud_policy_provider.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_CLOUD_POLICY_PROVIDER_H_
 #define CHROME_BROWSER_POLICY_CLOUD_POLICY_PROVIDER_H_
 #pragma once
 
 #include "base/basictypes.h"
-#include "chrome/browser/policy/cloud_policy_cache_base.h"
 #include "chrome/browser/policy/configuration_policy_provider.h"
 
 namespace policy {
 
+class CloudPolicyCacheBase;
+
 // A policy provider having multiple backend caches, combining their relevant
 // PolicyMaps and keeping the result cached. The underlying caches are kept as
 // weak references and can be added  dynamically. Also the
 // |CloudPolicyProvider| instance listens to cache-notifications and removes
 // the caches automatically when they go away. The order in which the caches are
 // stored matters! The first cache is applied as is and the following caches
 // only contribute the not-yet applied policies. There are two functions to add
 // a new cache:
 //   PrependCache(cache): adds |cache| to the front (i.e. most important cache).
 //   AppendCache(cache):  adds |cache| to the back (i.e. least important cache).
@@ skipping 13 matching lines @@
   // automatically remove it from |caches_|.
   virtual void PrependCache(CloudPolicyCacheBase* cache) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CloudPolicyProvider);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CLOUD_POLICY_PROVIDER_H_