[USS] Move GetAllNodes from backend to controller

components/sync/driver/non_blocking_data_type_controller.h

Index: components/sync/driver/non_blocking_data_type_controller.h
diff --git a/components/sync/driver/non_blocking_data_type_controller.h b/components/sync/driver/non_blocking_data_type_controller.h
index f98661e0b5e92e7010cb3cd55180d25d552c2821..5dc1993a355714a3858815f160a99a84c930c7bb 100644
--- a/components/sync/driver/non_blocking_data_type_controller.h
+++ b/components/sync/driver/non_blocking_data_type_controller.h
@@ -43,6 +43,8 @@ class NonBlockingDataTypeController : public sync_driver::DataTypeController {
   // DataTypeController interface.
   bool ShouldLoadModelBeforeConfigure() const override;
   void LoadModels(const ModelLoadCallback& model_load_callback) override;
+  void GetAllNodes(scoped_refptr<base::SequencedTaskRunner> task_runner,
+                   const AllNodesCallback& callback) override;
 
   // Registers non-blocking data type with sync backend. In the process the
   // activation context is passed to ModelTypeRegistry, where ModelTypeWorker