Revert of [Sync] Make directory types registration explicit in ModelTypeRegistry

components/sync/engine_impl/sync_scheduler.h

Index: components/sync/engine_impl/sync_scheduler.h
diff --git a/components/sync/engine_impl/sync_scheduler.h b/components/sync/engine_impl/sync_scheduler.h
index 160dc1c18cf5091bf3aa953b579421e4e147914b..c1c18b279d4558192a2199339610ecb1401fea63 100644
--- a/components/sync/engine_impl/sync_scheduler.h
+++ b/components/sync/engine_impl/sync_scheduler.h
@@ -26,6 +26,7 @@
   ConfigurationParams(
       const sync_pb::GetUpdatesCallerInfo::GetUpdatesSource& source,
       ModelTypeSet types_to_download,
+      const ModelSafeRoutingInfo& routing_info,
       const base::Closure& ready_task,
       const base::Closure& retry_task);
   ConfigurationParams(const ConfigurationParams& other);
@@ -35,6 +36,8 @@
   sync_pb::GetUpdatesCallerInfo::GetUpdatesSource source;
   // The types that should be downloaded.
   ModelTypeSet types_to_download;
+  // The new routing info (superset of types to be downloaded).
+  ModelSafeRoutingInfo routing_info;
   // Callback to invoke on configuration completion.
   base::Closure ready_task;
   // Callback to invoke on configuration failure.