Changing window.requestLayoutFrame into a microtask API

tools/dom/templates/html/dart2js/impl_Window.darttemplate

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of html;
 
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS native "@*DOMWindow" {
 
   Document get document => JS('Document', '#.document', this);
 
@@ skipping 53 matching lines @@
     // On Firefox the code that implements 'is Location' fails to find the patch
     // stub on Object.prototype and throws an exception.
     try {
       return thing is Location;
     } catch (e) {
       return false;
     }
   }
 
   /**
-   * Executes a [callback] after the next batch of browser layout measurements
-   * has completed or would have completed if any browser layout measurements
-   * had been scheduled.
+   * Executes a [callback] after the immediate execution stack has completed.
+   *
+   * This will cause the callback to be executed after all processing has
+   * completed for the current event, but before any subsequent events.
    */
-  void requestLayoutFrame(TimeoutHandler callback) {
-    _addMeasurementFrameCallback(callback);
+  void setImmediate(TimeoutHandler callback) {
+    _addMicrotaskCallback(callback);
   }
 
   @DomName('DOMWindow.requestAnimationFrame')
   int requestAnimationFrame(RequestAnimationFrameCallback callback) {
     _ensureRequestAnimationFrame();
     return _requestAnimationFrame(callback);
   }
 
   void cancelAnimationFrame(id) {
     _ensureRequestAnimationFrame();
@@ skipping 62 matching lines @@
    * running in this window.
    */
   void registerPort(String name, var port) {
     var serialized = _serialize(port);
     document.documentElement.attributes['dart-port:$name'] = json.stringify(serialized);
   }
 
   @DomName('Window.console')
   Console get console => Console.safeConsole;
 
+  /// Checks if _setImmediate is supported.
+  static bool get _supportsSetImmediate =>
+      JS('bool', '!!(window.setImmediate)');
+
+  // Set immediate implementation for IE
+  void _setImmediate(void callback()) {
+    JS('void', '#.setImmediate(#)', this, convertDartClosureToJS(callback, 0));
+  }
+
 $!MEMBERS
 }