USS SyncContextProxy / data type activation refactoring

sync/sessions/model_type_registry.h

Index: sync/sessions/model_type_registry.h
diff --git a/sync/sessions/model_type_registry.h b/sync/sessions/model_type_registry.h
index 9e097cfb988a6e5c7424772d078d93d474318813..6ac0c7c63c20ae9e5628c8d1869990d45f3862db 100644
--- a/sync/sessions/model_type_registry.h
+++ b/sync/sessions/model_type_registry.h
@@ -63,11 +63,7 @@ class SYNC_EXPORT_PRIVATE ModelTypeRegistry
   // Expects that the proxy's ModelType is not currently enabled.
   void ConnectSyncTypeToWorker(
       syncer::ModelType type,
-      const syncer_v2::DataTypeState& data_type_state,
-      const syncer_v2::UpdateResponseDataList& saved_pending_updates,
-      const scoped_refptr<base::SequencedTaskRunner>& type_task_runner,
-      const base::WeakPtr<syncer_v2::ModelTypeProcessor>& type_processor)
-      override;
+      scoped_ptr<syncer_v2::ActivationContext> activation_context) override;
 
   // Disables the syncing of an off-thread type.
   //