Pass the previous and the current PolicyMap to Observers of the PolicyService.

chrome/browser/policy/configuration_policy_pref_store.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_PREF_STORE_H_
 #define CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PREF_STORE_H_
 #pragma once
 
 #include <string>
 
@@ skipping 24 matching lines @@
   // PrefStore methods:
   virtual void AddObserver(PrefStore::Observer* observer) OVERRIDE;
   virtual void RemoveObserver(PrefStore::Observer* observer) OVERRIDE;
   virtual size_t NumberOfObservers() const OVERRIDE;
   virtual bool IsInitializationComplete() const OVERRIDE;
   virtual ReadResult GetValue(const std::string& key,
                               const Value** result) const OVERRIDE;
 
   // PolicyService::Observer methods:
   virtual void OnPolicyUpdated(PolicyDomain domain,
-                               const std::string& component_id) OVERRIDE;
+                               const std::string& component_id,
+                               const PolicyMap& previous,
+                               const PolicyMap& current) OVERRIDE;
   virtual void OnPolicyServiceInitialized() OVERRIDE;
 
   // Creates a ConfigurationPolicyPrefStore that only provides policies that
   // have POLICY_LEVEL_MANDATORY level.
   static ConfigurationPolicyPrefStore* CreateMandatoryPolicyPrefStore();
 
   // Creates a ConfigurationPolicyPrefStore that only provides policies that
   // have POLICY_LEVEL_RECOMMENDED level.
   static ConfigurationPolicyPrefStore* CreateRecommendedPolicyPrefStore();
 
@@ skipping 16 matching lines @@
   scoped_ptr<PrefValueMap> prefs_;
 
   ObserverList<PrefStore::Observer, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyPrefStore);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PREF_STORE_H_