Run dartfmt on all files under runtime.

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

Index: runtime/observatory/tests/observatory_ui/heap_snapshot/element_test.dart
diff --git a/runtime/observatory/tests/observatory_ui/heap_snapshot/element_test.dart b/runtime/observatory/tests/observatory_ui/heap_snapshot/element_test.dart
index 1136e392686fa435e858b40ed542a621f6d29335..6e7b6160be86ecb7e896531ba7928c6781f6c3a5 100644
--- a/runtime/observatory/tests/observatory_ui/heap_snapshot/element_test.dart
+++ b/runtime/observatory/tests/observatory_ui/heap_snapshot/element_test.dart
@@ -22,44 +22,37 @@ main() {
   final snapshots = new HeapSnapshotRepositoryMock();
   final instances = new InstanceRepositoryMock();
   test('instantiation', () {
-    final e = new HeapSnapshotElement(vm, isolate, events, notifs, snapshots,
-                                      instances);
+    final e = new HeapSnapshotElement(
+        vm, isolate, events, notifs, snapshots, instances);
     expect(e, isNotNull, reason: 'element correctly created');
   });
   test('elements created', () async {
-    final controller
-        = new StreamController<M.HeapSnapshotLoadingProgressEvent>.broadcast();
-    final snapshots = new HeapSnapshotRepositoryMock(
-      getter: (M.IsolateRef i, bool gc) {
-        expect(i, equals(isolate));
-        expect(gc, isFalse);
-        return controller.stream;
-      }
-    );
-    final e = new HeapSnapshotElement(vm, isolate, events, notifs, snapshots,
-                                      instances);
+    final controller =
+        new StreamController<M.HeapSnapshotLoadingProgressEvent>.broadcast();
+    final snapshots =
+        new HeapSnapshotRepositoryMock(getter: (M.IsolateRef i, bool gc) {
+      expect(i, equals(isolate));
+      expect(gc, isFalse);
+      return controller.stream;
+    });
+    final e = new HeapSnapshotElement(
+        vm, isolate, events, notifs, snapshots, instances);
     document.body.append(e);
     await e.onRendered.first;
     expect(e.children.length, isNonZero, reason: 'has elements');
     expect(e.querySelectorAll(tTag).length, isZero);
     controller.add(const HeapSnapshotLoadingProgressEventMock(
-      progress: const HeapSnapshotLoadingProgressMock(
-        status: M.HeapSnapshotLoadingStatus.fetching
-      )
-    ));
+        progress: const HeapSnapshotLoadingProgressMock(
+            status: M.HeapSnapshotLoadingStatus.fetching)));
     await e.onRendered.first;
     expect(e.querySelectorAll(tTag).length, isZero);
     controller.add(const HeapSnapshotLoadingProgressEventMock(
-      progress: const HeapSnapshotLoadingProgressMock(
-        status: M.HeapSnapshotLoadingStatus.loading
-      )
-    ));
+        progress: const HeapSnapshotLoadingProgressMock(
+            status: M.HeapSnapshotLoadingStatus.loading)));
     controller.add(new HeapSnapshotLoadingProgressEventMock(
-      progress: new HeapSnapshotLoadingProgressMock(
-        status: M.HeapSnapshotLoadingStatus.loaded,
-        snapshot: new HeapSnapshotMock(timestamp: new DateTime.now())
-      )
-    ));
+        progress: new HeapSnapshotLoadingProgressMock(
+            status: M.HeapSnapshotLoadingStatus.loaded,
+            snapshot: new HeapSnapshotMock(timestamp: new DateTime.now()))));
     controller.close();
     await e.onRendered.first;
     expect(e.querySelectorAll(tTag).length, equals(1));