Use a service to create device management backends.

chrome/browser/profile.h

Index: chrome/browser/profile.h
diff --git a/chrome/browser/profile.h b/chrome/browser/profile.h
index f76a2732680547930b7f74c59e9acd8f2fcb8242..ac70b74fd050c4fa53ae2aba834d7740763376b5 100644
--- a/chrome/browser/profile.h
+++ b/chrome/browser/profile.h
@@ -31,7 +31,7 @@ class SSLConfigService;
 }
 
 namespace policy {
-class DeviceManagementPolicyProvider;
+class ProfilePolicyContext;
 }
 
 namespace webkit_database {
@@ -476,9 +476,8 @@ class Profile {
   // Returns the PromoCounter for Instant, or NULL if not applicable.
   virtual PromoCounter* GetInstantPromoCounter() = 0;
 
-  // Get the device management policy provider for this profile.
-  virtual policy::DeviceManagementPolicyProvider*
-      GetDeviceManagementPolicyProvider() = 0;
+  // Gets the device management service associated with this profile.
+  virtual policy::ProfilePolicyContext* GetPolicyContext() = 0;
 
 #if defined(OS_CHROMEOS)
   // Returns ChromeOS's ProxyConfigServiceImpl, creating if not yet created.