refactor(VmTurnZone): use the browser microtask queue for JS

tools/broccoli/html-replace/SCRIPTS.html

@@ -1,5 +1,4 @@
-<script src="es6-promise.js" type="text/javascript"></script>
-<script src="zone.js" type="text/javascript"></script>
+<script src="zone-microtask.js" type="text/javascript"></script>
 <script src="long-stack-trace-zone.js" type="text/javascript"></script>
 <script src="traceur-runtime.js" type="text/javascript"></script>
 <script src="es6-module-loader-sans-promises.src.js" type="text/javascript"></script>

tools/broccoli/html-replace/SCRIPTS_benchmarks.html

@@ -1,5 +1,4 @@
-<script src="es6-promise.js" type="text/javascript"></script>
-<script src="zone.js" type="text/javascript"></script>
+<script src="zone-microtask.js" type="text/javascript"></script>
 <script src="long-stack-trace-zone.js" type="text/javascript"></script>
 <script src="url_params_to_form.js" type="text/javascript"></script>
 <script src="traceur-runtime.js" type="text/javascript"></script>

tools/broccoli/html-replace/SCRIPTS_benchmarks_external.html

@@ -1,5 +1,4 @@
-<script src="es6-promise.js" type="text/javascript"></script>
-<script src="zone.js" type="text/javascript"></script>
+<script src="zone-microtask.js" type="text/javascript"></script>
 <script src="long-stack-trace-zone.js" type="text/javascript"></script>
 <script src="angular.js" type="text/javascript"></script>
 <script src="url_params_to_form.js" type="text/javascript"></script>

tools/broccoli/trees/browser_tree.ts

@@ -78,8 +78,7 @@ module.exports = function makeBrowserTree(options, destinationPath) {
 
   var vendorScriptsTree = flatten(new Funnel('.', {
     files: [
-      'zone/es6-promise.js',
-      'zone/zone.js',
+      'zone/zone-microtask.js',
       'zone/long-stack-trace-zone.js',
       'node_modules/es6-module-loader/dist/es6-module-loader-sans-promises.src.js',
       'node_modules/systemjs/dist/system.src.js',