[ESLint] Fix violations when enabling curly rule in eslint.

tracing/tracing/extras/tquery/filter_has_ancestor.html

Index: tracing/tracing/extras/tquery/filter_has_ancestor.html
diff --git a/tracing/tracing/extras/tquery/filter_has_ancestor.html b/tracing/tracing/extras/tquery/filter_has_ancestor.html
index 2b7d21148c99bc139be28d09fc274d6e9df771c6..355837ccd112f96fcf46a712b9a255d937813cab 100644
--- a/tracing/tracing/extras/tquery/filter_has_ancestor.html
+++ b/tracing/tracing/extras/tquery/filter_has_ancestor.html
@@ -28,12 +28,12 @@ tr.exportTo('tr.e.tquery', function() {
     },
 
     evaluate: function(context) {
-      if (!this.subExpression)
+      if (!this.subExpression) {
         return context.ancestors.length > 0;
+      }
       while (context.ancestors.length) {
         context = context.pop();
-        if (this.subExpression.evaluate(context))
-          return true;
+        if (this.subExpression.evaluate(context)) return true;
       }
       return false;
     }