Introduced a ForwardingPolicyProvider.

chrome/browser/extensions/api/storage/policy_value_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_EXTENSIONS_API_STORAGE_POLICY_VALUE_STORE_H_
 #define CHROME_BROWSER_EXTENSIONS_API_STORAGE_POLICY_VALUE_STORE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 14 matching lines @@
 // run the function of the storage.managed namespace; it's read-only for the
 // extension. The ManagedValueStoreCache sends updated policy to this store
 // and manages its lifetime.
 class PolicyValueStore : public ValueStore {
  public:
   PolicyValueStore(const std::string& extension_id,
                    const scoped_refptr<SettingsObserverList>& observers,
                    scoped_ptr<ValueStore> delegate);
   virtual ~PolicyValueStore();
 
-  // Stores |policy| in the persistent database represented by the |delegate_|.
-  // If |notify_if_changed| and |policy| differs from the previously persisted
-  // version, then a notification is sent to the |observers_| with a list of the
-  // changes detected.
-  void SetCurrentPolicy(const policy::PolicyMap& policy,
-                        bool notify_if_changed);
+  // Stores |policy| in the persistent database represented by the |delegate_|
+  // and notifies observers with the changes from the previous policy.
+  void SetCurrentPolicy(const policy::PolicyMap& policy);
 
   // Clears all the stored data and deletes the database.
   void DeleteStorage();
 
   // ValueStore implementation:
   virtual size_t GetBytesInUse(const std::string& key) OVERRIDE;
   virtual size_t GetBytesInUse(const std::vector<std::string>& keys) OVERRIDE;
   virtual size_t GetBytesInUse() OVERRIDE;
   virtual ReadResult Get(const std::string& key) OVERRIDE;
   virtual ReadResult Get(const std::vector<std::string>& keys) OVERRIDE;
@@ skipping 15 matching lines @@
   std::string extension_id_;
   scoped_refptr<SettingsObserverList> observers_;
   scoped_ptr<ValueStore> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(PolicyValueStore);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_STORAGE_POLICY_VALUE_STORE_H_