[USS] Move GetAllNodes from backend to controller

components/sync/driver/non_blocking_data_type_controller.cc

Index: components/sync/driver/non_blocking_data_type_controller.cc
diff --git a/components/sync/driver/non_blocking_data_type_controller.cc b/components/sync/driver/non_blocking_data_type_controller.cc
index 4d293c8ff827c6d90b3dece83f8a9e518cf4d948..b6fe11dff0a83f0b2f8cf0ddee32833a52677ef9 100644
--- a/components/sync/driver/non_blocking_data_type_controller.cc
+++ b/components/sync/driver/non_blocking_data_type_controller.cc
@@ -78,6 +78,17 @@ void NonBlockingDataTypeController::LoadModels(
   }
 }
 
+void NonBlockingDataTypeController::GetAllNodes(
+    scoped_refptr<base::SequencedTaskRunner> task_runner,
+    const AllNodesCallback& callback) {
+  ScopedVector<base::ListValue> node_lists;
+  std::vector<syncer::ModelType> types_vector;
+  types_vector.push_back(type());
+  node_lists.push_back(new base::ListValue());
+  task_runner->PostTask(
+      FROM_HERE, base::Bind(callback, types_vector, base::Passed(&node_lists)));
+}
+
 void NonBlockingDataTypeController::LoadModelsDone(
     ConfigureResult result,
     const syncer::SyncError& error) {