Return short-hand object literals to exportTo.

tracing/tracing/ui/base/chart_base.html

Index: tracing/tracing/ui/base/chart_base.html
diff --git a/tracing/tracing/ui/base/chart_base.html b/tracing/tracing/ui/base/chart_base.html
index 38038d978a0ae73863a7f56717edbd78c8a223b1..2a4cddb908fb7db68f4f07a7856c25cd1aea0d41 100644
--- a/tracing/tracing/ui/base/chart_base.html
+++ b/tracing/tracing/ui/base/chart_base.html
@@ -50,7 +50,7 @@ tr.exportTo('tr.ui.b', function() {
   }
 
   return {
-    getSVGTextWidth: getSVGTextWidth
+    getSVGTextWidth,
   };
 });
 
@@ -494,9 +494,9 @@ tr.exportTo('tr.ui.b', function() {
   };
 
   return {
-    DataSeriesEnableChangeEventType: DataSeriesEnableChangeEventType,
-    getColorOfKey: getColorOfKey,
-    ChartBase: ChartBase
+    DataSeriesEnableChangeEventType,
+    getColorOfKey,
+    ChartBase,
   };
 });
 </script>