Added RefreshPolicies to PolicyService.

chrome/browser/policy/policy_service_impl.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_POLICY_SERVICE_IMPL_H_
 #define CHROME_BROWSER_POLICY_POLICY_SERVICE_IMPL_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 23 matching lines @@
   virtual void AddObserver(PolicyDomain domain,
                            const std::string& component_id,
                            PolicyService::Observer* observer) OVERRIDE;
   virtual void RemoveObserver(PolicyDomain domain,
                               const std::string& component_id,
                               PolicyService::Observer* observer) OVERRIDE;
   virtual const PolicyMap* GetPolicies(
       PolicyDomain domain,
       const std::string& component_id) const OVERRIDE;
   virtual bool IsInitializationComplete() const OVERRIDE;
+  virtual void RefreshPolicies(const base::Closure& callback) OVERRIDE;
 
  private:
   struct Entry;
   struct ProviderData;
 
   typedef std::pair<PolicyDomain, std::string> PolicyNamespace;
   typedef std::map<PolicyNamespace, Entry*> EntryMap;
   typedef std::vector<ProviderData*> ProviderList;
 
   // ConfigurationPolicyProvider::Observer overrides:
   virtual void OnUpdatePolicy(ConfigurationPolicyProvider* provider) OVERRIDE;
   virtual void OnProviderGoingAway(
       ConfigurationPolicyProvider* provider) OVERRIDE;
 
   Entry* GetOrCreate(const PolicyNamespace& ns);
   ProviderList::iterator GetProviderData(ConfigurationPolicyProvider* provider);
 
   // Erases the entry for |ns|, if it has no observers and no policies.
   void MaybeCleanup(const PolicyNamespace& ns);
 
   // Combines the policies from all the providers, and notifies the observers
   // of namespaces whose policies have been modified.
-  void MergeAndTriggerUpdates();
+  // |is_refresh| should be true if MergeAndTriggerUpdates() was invoked because
+  // a provider has just refreshed its policies.
+  void MergeAndTriggerUpdates(bool is_refresh);
 
   // Contains all the providers together with a cached copy of their policies
   // and their registrars.
   ProviderList providers_;
 
   // Maps each policy namespace to its current policies.
   EntryMap entries_;
 
   // True if all the providers are initialized.
   bool initialization_complete_;
 
+  // List of callbacks to invoke once all providers refresh after a
+  // RefreshPolicies() call.
+  std::vector<base::Closure> refresh_callbacks_;
+
   DISALLOW_COPY_AND_ASSIGN(PolicyServiceImpl);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_POLICY_SERVICE_IMPL_H_