Use a service to create device management backends.

chrome/browser/profile_impl.h

Index: chrome/browser/profile_impl.h
diff --git a/chrome/browser/profile_impl.h b/chrome/browser/profile_impl.h
index b5fd6f8f16ee3ff8b6129cbb19d38669810e58f2..ceb357a5ba0516d70151d20d7be82f63c7539d0d 100644
--- a/chrome/browser/profile_impl.h
+++ b/chrome/browser/profile_impl.h
@@ -124,6 +124,7 @@ class ProfileImpl : public Profile,
   virtual ExtensionInfoMap* GetExtensionInfoMap();
   virtual PromoCounter* GetInstantPromoCounter();
   virtual BrowserSignin* GetBrowserSignin();
+  virtual policy::DeviceManagementService* GetDeviceManagementService();
   virtual policy::DeviceManagementPolicyProvider*
       GetDeviceManagementPolicyProvider();
 
@@ -180,6 +181,8 @@ class ProfileImpl : public Profile,
       transport_security_state_;
   scoped_refptr<TransportSecurityPersister>
       transport_security_persister_;
+  scoped_ptr<policy::DeviceManagementPolicyProvider>
+      device_management_policy_provider_;
   scoped_ptr<PrefService> prefs_;
   scoped_ptr<NetPrefObserver> net_pref_observer_;
   scoped_ptr<TemplateURLFetcher> template_url_fetcher_;
@@ -273,8 +276,7 @@ class ProfileImpl : public Profile,
 
   scoped_refptr<ExtensionInfoMap> extension_info_map_;
 
-  scoped_ptr<policy::DeviceManagementPolicyProvider>
-      device_management_policy_provider_;
+  scoped_ptr<policy::DeviceManagementService> device_management_service_;
 
 #if defined(OS_CHROMEOS)
   scoped_ptr<chromeos::Preferences> chromeos_preferences_;