Use dartfmt on Observatory code

runtime/observatory/lib/src/elements/nav/refresh.dart

Index: runtime/observatory/lib/src/elements/nav/refresh.dart
diff --git a/runtime/observatory/lib/src/elements/nav/refresh.dart b/runtime/observatory/lib/src/elements/nav/refresh.dart
index b246851b9643c980fa17e964b16c74a07000d308..0b515d4ca37f5fdf8c8785be700c5cf8a9ef2ac2 100644
--- a/runtime/observatory/lib/src/elements/nav/refresh.dart
+++ b/runtime/observatory/lib/src/elements/nav/refresh.dart
@@ -20,7 +20,7 @@ class NavRefreshElement extends HtmlElement implements Renderable {
   Stream<RenderedEvent<NavRefreshElement>> get onRendered => _r.onRendered;
 
   final StreamController<RefreshEvent> _onRefresh =
-                                new StreamController<RefreshEvent>.broadcast();
+      new StreamController<RefreshEvent>.broadcast();
   Stream<RefreshEvent> get onRefresh => _onRefresh.stream;
 
   bool _disabled;
@@ -32,8 +32,8 @@ class NavRefreshElement extends HtmlElement implements Renderable {
   set disabled(bool value) => _disabled = _r.checkAndReact(_disabled, value);
   set label(String value) => _label = _r.checkAndReact(_label, value);
 
-  factory NavRefreshElement({String label: 'Refresh', bool disabled: false,
-                             RenderingQueue queue}) {
+  factory NavRefreshElement(
+      {String label: 'Refresh', bool disabled: false, RenderingQueue queue}) {
     assert(label != null);
     assert(disabled != null);
     NavRefreshElement e = document.createElement(tag.name);