[Sync] Convert DTCs to be not RefCounted and NonThreadSafe.

components/sync/driver/ui_model_type_controller.h

Index: components/sync/driver/ui_model_type_controller.h
diff --git a/components/sync/driver/ui_model_type_controller.h b/components/sync/driver/ui_model_type_controller.h
index b937841613f912ecc9bed55a73f9769ee6c3be1b..5dae109ef4fb3ee58b1d4f1074f04d890d18e400 100644
--- a/components/sync/driver/ui_model_type_controller.h
+++ b/components/sync/driver/ui_model_type_controller.h
@@ -17,18 +17,12 @@ namespace sync_driver_v2 {
 // thread.
 class UIModelTypeController : public NonBlockingDataTypeController {
  public:
-  UIModelTypeController(
-      const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread,
-      const base::Closure& error_callback,
-      syncer::ModelType model_type,
-      sync_driver::SyncClient* sync_client);
-
- protected:
+  // |dump_stack| is called when an unrecoverable error occurs.
+  UIModelTypeController(syncer::ModelType type,
+                        const base::Closure& dump_stack,
+                        sync_driver::SyncClient* sync_client);
   ~UIModelTypeController() override;
 
-  void RunOnUIThread(const tracked_objects::Location& from_here,
-                     const base::Closure& task) override;
-
  private:
   // NonBlockingDataTypeController implementations.
   // Since this is UI model type controller, we hide this function here.