Use dartfmt on Observatory code

runtime/observatory/lib/src/elements/isolate/counter_chart.dart

Index: runtime/observatory/lib/src/elements/isolate/counter_chart.dart
diff --git a/runtime/observatory/lib/src/elements/isolate/counter_chart.dart b/runtime/observatory/lib/src/elements/isolate/counter_chart.dart
index fc782a4e93aa9219468a423bfbd004588be8683e..b3917ec1269b7684b568dbc8b283677781becef2 100644
--- a/runtime/observatory/lib/src/elements/isolate/counter_chart.dart
+++ b/runtime/observatory/lib/src/elements/isolate/counter_chart.dart
@@ -11,7 +11,7 @@ import 'package:observatory/src/elements/helpers/tag.dart';
 
 class IsolateCounterChartElement extends HtmlElement implements Renderable {
   static const tag =
-    const Tag<IsolateCounterChartElement>('isolate-counter-chart');
+      const Tag<IsolateCounterChartElement>('isolate-counter-chart');
 
   RenderingScheduler<IsolateCounterChartElement> _r;
 
@@ -52,23 +52,26 @@ class IsolateCounterChartElement extends HtmlElement implements Renderable {
   ];
 
   void render() {
-    final _series = [new ChartSeries("Work", const [1], new PieChartRenderer(
-      sortDataByValue: false
-    ))];
+    final _series = [
+      new ChartSeries(
+          "Work", const [1], new PieChartRenderer(sortDataByValue: false))
+    ];
     final areaHost = new DivElement()..classes = ['host'];
-    final  legendHost = new DivElement()..classes = ['legend'];
+    final legendHost = new DivElement()..classes = ['legend'];
     children = [areaHost, legendHost];
     final rect = areaHost.getBoundingClientRect();
     final minSize = new Rect.size(rect.width, rect.height);
     final config = new ChartConfig(_series, const [0])
-        ..minimumSize = minSize
-        ..legend = new ChartLegend(legendHost, showValues: true);
-    final data = new ChartData(_columns, _counters.keys
-          .map((key) => [key, double.parse(_counters[key].split('%')[0])])
-          .toList());
+      ..minimumSize = minSize
+      ..legend = new ChartLegend(legendHost, showValues: true);
+    final data = new ChartData(
+        _columns,
+        _counters.keys
+            .map((key) => [key, double.parse(_counters[key].split('%')[0])])
+            .toList());
 
-    new LayoutArea(areaHost, data, config, state: new ChartState(),
-        autoUpdate: false)
+    new LayoutArea(areaHost, data, config,
+        state: new ChartState(), autoUpdate: false)
       ..addChartBehavior(new Hovercard())
       ..addChartBehavior(new AxisLabelTooltip())
       ..draw();