[Sync] Make generic non-frontend thread datatype controller.

chrome/browser/sync/profile_sync_factory.h

Index: chrome/browser/sync/profile_sync_factory.h
diff --git a/chrome/browser/sync/profile_sync_factory.h b/chrome/browser/sync/profile_sync_factory.h
index 776b61dde26fe3c96d7587e0c877b1e4887a382d..8befe3513cc5a76f465e49490391b892c72a2f89 100644
--- a/chrome/browser/sync/profile_sync_factory.h
+++ b/chrome/browser/sync/profile_sync_factory.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -47,12 +47,15 @@ class ProfileSyncFactory {
 
   virtual ~ProfileSyncFactory() {}
 
-  // Instantiates and initializes a new ProfileSyncService.  Enabled
-  // data types are registered with the service.  The return pointer
-  // is owned by the caller.
+  // Instantiates a new ProfileSyncService. The return pointer is owned by the
+  // caller.
   virtual ProfileSyncService* CreateProfileSyncService(
       const std::string& cros_user) = 0;
 
+  // Creates and registers enabled datatypes with the provided
+  // ProfileSyncService.
+  virtual void RegisterDataTypes(ProfileSyncService* pss) = 0;
+
   // Instantiates a new DataTypeManager with a SyncBackendHost and a
   // list of data type controllers.  The return pointer is owned by
   // the caller.