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

tracing/tracing/importer/simple_line_reader.html

Index: tracing/tracing/importer/simple_line_reader.html
diff --git a/tracing/tracing/importer/simple_line_reader.html b/tracing/tracing/importer/simple_line_reader.html
index 752bf0f7a4f3dae52b87aaacd826a072c28c490e..636c9e88585a58534928378811ad399703399432 100644
--- a/tracing/tracing/importer/simple_line_reader.html
+++ b/tracing/tracing/importer/simple_line_reader.html
@@ -23,10 +23,10 @@ tr.exportTo('tr.importer', function() {
     advanceToLineMatching: function(regex) {
       for (; this.curLine_ < this.lines_.length; this.curLine_++) {
         var line = this.lines_[this.curLine_];
-        if (this.savedLines_ !== undefined)
+        if (this.savedLines_ !== undefined) {
           this.savedLines_.push(line);
-        if (regex.test(line))
-          return true;
+        }
+        if (regex.test(line)) return true;
       }
       return false;
     },