[USS] Move GetAllNodes from backend to controller

components/sync/driver/ui_data_type_controller.cc

Index: components/sync/driver/ui_data_type_controller.cc
diff --git a/components/sync/driver/ui_data_type_controller.cc b/components/sync/driver/ui_data_type_controller.cc
index abc3430b0cc490fae5dff3f8151048bae673bc01..ccab2de1feffa6f78b60b8eb558b6d5369e1959b 100644
--- a/components/sync/driver/ui_data_type_controller.cc
+++ b/components/sync/driver/ui_data_type_controller.cc
@@ -26,8 +26,8 @@ namespace sync_driver {
 
 UIDataTypeController::UIDataTypeController()
     : DirectoryDataTypeController(base::ThreadTaskRunnerHandle::Get(),
-                                  base::Closure()),
-      sync_client_(NULL),
+                                  base::Closure(),
+                                  nullptr),
       state_(NOT_RUNNING),
       type_(syncer::UNSPECIFIED) {}
 
@@ -36,8 +36,7 @@ UIDataTypeController::UIDataTypeController(
     const base::Closure& error_callback,
     syncer::ModelType type,
     SyncClient* sync_client)
-    : DirectoryDataTypeController(ui_thread, error_callback),
-      sync_client_(sync_client),
+    : DirectoryDataTypeController(ui_thread, error_callback, sync_client),
       state_(NOT_RUNNING),
       type_(type),
       processor_factory_(new GenericChangeProcessorFactory()),