Move js perf test to another directory.

test/js-perf-test/Collections/map.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 var MapBenchmark = new BenchmarkSuite('Map', [1000], [
   new Benchmark('Set', false, false, 0, MapSet),
   new Benchmark('Has', false, false, 0, MapHas, MapSetup, MapTearDown),
   new Benchmark('Get', false, false, 0, MapGet, MapSetup, MapTearDown),
   new Benchmark('Delete', false, false, 0, MapDelete, MapSetup, MapTearDown),
@@ skipping 61 matching lines @@
 }
 
 
 function MapForEach() {
   map.forEach(function(v, k) {
     if (v !== k) {
       throw new Error();
     }
   });
 }