Rename runAsync to scheduleMicrotask.

pkg/custom_element/lib/custom_element.dart

 // Copyright (c) 2013, 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.
 
 /**
  * Custom DOM elements.
  *
  * This library provides access to the Polymer project's
  * [Custom Elements]
  * (http://www.polymer-project.org/platform/custom-elements.html)
@@ skipping 607 matching lines @@
   CustomElement element = ctor();
   element.host = node;
 
   // TODO(jmesserly): replace lifecycle stuff with a proper polyfill.
   element.created();
 
   _registerLifecycleInsert(element);
 }
 
 void _registerLifecycleInsert(CustomElement element) {
-  runAsync(() {
+  scheduleMicrotask(() {
     // TODO(jmesserly): bottom up or top down insert?
     var node = element.host;
 
     // TODO(jmesserly): need a better check to see if the node has been removed.
     if (node.parentNode == null) return;
 
     _registerLifecycleRemove(element);
     element.inserted();
   });
 }
 
 void _registerLifecycleRemove(CustomElement element) {
   // TODO(jmesserly): need fallback or polyfill for MutationObserver.
   if (!MutationObserver.supported) return;
 
   new MutationObserver((records, observer) {
     var node = element.host;
     for (var record in records) {
       for (var removed in record.removedNodes) {
         if (identical(node, removed)) {
           observer.disconnect();
           element.removed();
           return;
         }
       }
     }
   }).observe(element.parentNode, childList: true);
 }