Run dartfmt on all files under runtime.

runtime/observatory/tests/observatory_ui/ports/element_test.dart

Index: runtime/observatory/tests/observatory_ui/ports/element_test.dart
diff --git a/runtime/observatory/tests/observatory_ui/ports/element_test.dart b/runtime/observatory/tests/observatory_ui/ports/element_test.dart
index 9f7807b83862af695f56e662eb5e5e061922f255..4b232b358417613c07863ce27c89e974d1306b04 100644
--- a/runtime/observatory/tests/observatory_ui/ports/element_test.dart
+++ b/runtime/observatory/tests/observatory_ui/ports/element_test.dart
@@ -30,11 +30,10 @@ main() {
     ];
     const isolatePorts = const PortsMock(elements: elements);
     final ports = new PortsRepositoryMock(
-      getter: expectAsync((i) async {
-        expect(i, equals(isolate));
-        return isolatePorts;
-      }, count: 1)
-    );
+        getter: expectAsync((i) async {
+      expect(i, equals(isolate));
+      return isolatePorts;
+    }, count: 1));
     final instances = new InstanceRepositoryMock();
     final e = new PortsElement(vm, isolate, events, notifs, ports, instances);
     document.body.append(e);