USS SyncContextProxy / data type activation refactoring

components/sync_driver/data_type_controller.h

Index: components/sync_driver/data_type_controller.h
diff --git a/components/sync_driver/data_type_controller.h b/components/sync_driver/data_type_controller.h
index d9635d69582f954bd047fa7267b2d0ead0701a5f..2c701c091045464c4c45e2f5442da248585beb6c 100644
--- a/components/sync_driver/data_type_controller.h
+++ b/components/sync_driver/data_type_controller.h
@@ -149,11 +149,6 @@ class DataTypeController
       const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread,
       const base::Closure& error_callback);
 
-  // If the DTC is waiting for models to load, once the models are
-  // loaded the datatype service will call this function on DTC to let
-  // us know that it is safe to start associating.
-  virtual void OnModelLoaded() = 0;
-
   ~DataTypeController() override;
 
   // The callback that will be invoked when an unrecoverable error occurs.