[Sync] Register USS types with ModelTypeRegistry before download

sync/internal_api/sync_manager_impl.h

Index: sync/internal_api/sync_manager_impl.h
diff --git a/sync/internal_api/sync_manager_impl.h b/sync/internal_api/sync_manager_impl.h
index 5efc905a333f84118fb48ba5bcecb8901c18ccf4..6c4e6a345402d084982414fa9b2abb7e3c1e68e9 100644
--- a/sync/internal_api/sync_manager_impl.h
+++ b/sync/internal_api/sync_manager_impl.h
@@ -294,8 +294,7 @@ class SYNC_EXPORT SyncManagerImpl
   // This state changes when entering or exiting a configuration cycle.
   scoped_ptr<ModelTypeRegistry> model_type_registry_;
 
-  // The main interface for non-blocking sync types and a thread-safe wrapper.
-  scoped_ptr<syncer_v2::SyncContext> sync_context_;

[maxbogue, 2016/04/01 22:43:14]

Good catch!

[pavely, 2016/04/04 17:57:16]

Acknowledged.

+  // Thread-safe wrapper for main interface for non-blocking sync types.
   scoped_ptr<syncer_v2::SyncContextProxy> sync_context_proxy_;
 
   // A container of various bits of information used by the SyncScheduler to