Run dartfmt on all files under runtime.

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

Index: runtime/observatory/tests/observatory_ui/objectpool_view/element_test.dart
diff --git a/runtime/observatory/tests/observatory_ui/objectpool_view/element_test.dart b/runtime/observatory/tests/observatory_ui/objectpool_view/element_test.dart
index 11f2ee946e0268a92f4d158ec50bdf8881149b4f..5512ad8a0f119fe34288bc6a37cef55f8c394f90 100644
--- a/runtime/observatory/tests/observatory_ui/objectpool_view/element_test.dart
+++ b/runtime/observatory/tests/observatory_ui/objectpool_view/element_test.dart
@@ -28,23 +28,20 @@ main() {
   final instances = new InstanceRepositoryMock();
   test('instantiation', () {
     final e = new ObjectPoolViewElement(vm, isolate, pool, events, notifs,
-                                        pools, retainedSizes, reachableSizes,
-                                        inbounds, paths, instances);
+        pools, retainedSizes, reachableSizes, inbounds, paths, instances);
     expect(e, isNotNull, reason: 'element correctly created');
     expect(e.isolate, equals(isolate));
     expect(e.pool, equals(pool));
   });
   test('elements created after attachment', () async {
     final pools = new ObjectPoolRepositoryMock(
-      getter: expectAsync((i, id) async {
-        expect(i, equals(isolate));
-        expect(id, equals(pool.id));
-        return pool;
-      }, count: 1)
-    );
+        getter: expectAsync((i, id) async {
+      expect(i, equals(isolate));
+      expect(id, equals(pool.id));
+      return pool;
+    }, count: 1));
     final e = new ObjectPoolViewElement(vm, isolate, pool, events, notifs,
-                                        pools, retainedSizes, reachableSizes,
-                                        inbounds, paths, instances);
+        pools, retainedSizes, reachableSizes, inbounds, paths, instances);
     document.body.append(e);
     await e.onRendered.first;
     expect(e.children.length, isNonZero, reason: 'has elements');