[test] Add performance test for closures.

test/js-perf-test/Closures/run.js

Index: test/js-perf-test/Closures/run.js
diff --git a/test/js-perf-test/Scope/run.js b/test/js-perf-test/Closures/run.js
similarity index 88%
copy from test/js-perf-test/Scope/run.js
copy to test/js-perf-test/Closures/run.js
index 9ce00a15a5ae3b9c221da343343369e1ec699be8..08ab3570d26d35f6b0ef7bbc6a3279f809fd451c 100644
--- a/test/js-perf-test/Scope/run.js
+++ b/test/js-perf-test/Closures/run.js
@@ -4,12 +4,12 @@
 
 
 load('../base.js');
-load('with.js');
+load('closures.js');
 
 var success = true;
 
 function PrintResult(name, result) {
-  print(name + '-Scope(Score): ' + result);
+  print(name + '-Closures(Score): ' + result);
 }