Cosmetic cleanups in chrome/browser/policy/

chrome/browser/policy/user_policy_cache.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_USER_POLICY_CACHE_H_
 #define CHROME_BROWSER_POLICY_USER_POLICY_CACHE_H_
 #pragma once
 
 #include <string>
 
-#include "base/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "base/values.h"
 #include "chrome/browser/policy/cloud_policy_cache_base.h"
 #include "chrome/browser/policy/user_policy_disk_cache.h"
 
-namespace em = enterprise_management;
+class FilePath;
 
 namespace enterprise_management {
+
 class CachedCloudPolicyResponse;
 // <Old-style policy support> (see comment below)
 class GenericValue;
 // </Old-style policy support>
+
 }  // namespace enterprise_management
 
 namespace policy {
 
+namespace em = enterprise_management;
+
+class PolicyMap;
+
 // CloudPolicyCacheBase implementation that persists policy information
 // into the file specified by the c'tor parameter |backing_file_path|.
 class UserPolicyCache : public CloudPolicyCacheBase,
                         public UserPolicyDiskCache::Delegate {
  public:
   explicit UserPolicyCache(const FilePath& backing_file_path);
   virtual ~UserPolicyCache();
 
   // CloudPolicyCacheBase implementation:
   virtual void Load() OVERRIDE;
@@ skipping 35 matching lines @@
 
   // Used for constructing the weak ptr passed to |disk_cache_|.
   base::WeakPtrFactory<UserPolicyDiskCache::Delegate> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UserPolicyCache);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_USER_POLICY_CACHE_H_