Rework the device management backend implementation.

chrome/test/testing_profile.h

Index: chrome/test/testing_profile.h
diff --git a/chrome/test/testing_profile.h b/chrome/test/testing_profile.h
index fa593b33af18fa0397ab6ad1c7a8911117dcc96e..6dc21620515a98ee59288a3b5bc9c8c0f79ffd52 100644
--- a/chrome/test/testing_profile.h
+++ b/chrome/test/testing_profile.h
@@ -308,6 +308,13 @@ class TestingProfile : public Profile {
   virtual ChromeBlobStorageContext* GetBlobStorageContext() { return NULL; }
   virtual ExtensionInfoMap* GetExtensionInfoMap() { return NULL; }
   virtual PromoCounter* GetInstantPromoCounter() { return NULL; }
+  virtual policy::DeviceManagementService* GetDeviceManagementService() {
+    return NULL;
+  }
+  virtual policy::DeviceManagementPolicyProvider*
+      GetDeviceManagementPolicyProvider() {
+    return NULL;
+  }
 
  protected:
   base::Time start_time_;