Add support for setImmediate on IE.

sdk/lib/_internal/compiler/js_lib/async_patch.dart

 // 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.
 
 // Patch file for the dart:async library.
 
 import 'dart:_js_helper' show
     patch,
     Primitives,
     convertDartClosureToJS,
@@ skipping 45 matching lines @@
       return (void callback()) {
         assert(storedCallback == null);
         enterJsAsync();
         storedCallback = callback;
         // Because of a broken shadow-dom polyfill we have to change the
         // children instead a cheap property.
         // See https://github.com/Polymer/ShadowDOM/issues/468
         JS('', '#.firstChild ? #.removeChild(#): #.appendChild(#)',
             div, div, span, div, span);
       };
-
+    } else if (JS('', 'self.setImmediate') != null) {
+      return _scheduleImmediateWithSetImmediate;
     }
-    // TODO(9002): don't use the Timer to enqueue the immediate callback.
-    // Also check for other JS options like setImmediate.
     // TODO(20055): We should use DOM promises when available.
     return _scheduleImmediateWithTimer;
   }
 
   static void _scheduleImmediateJsOverride(void callback()) {
     internalCallback() {
       leaveJsAsync();
       callback();
     };
     enterJsAsync();
     JS('void', 'self.scheduleImmediate(#)',
        convertDartClosureToJS(internalCallback, 0));
   }
 
+  static void _scheduleImmediateWithSetImmediate(void callback()) {
+    internalCallback() {
+      leaveJsAsync();
+      callback();
+    };
+    enterJsAsync();
+    JS('void', 'self.setImmediate(#)',
+       convertDartClosureToJS(internalCallback, 0));
+  }
+
   static void _scheduleImmediateWithTimer(void callback()) {
     Timer._createTimer(Duration.ZERO, callback);
   }
 }
 
 @patch
 class DeferredLibrary {
   @patch
   Future<Null> load() {
     throw 'DeferredLibrary not supported. '
@@ skipping 13 matching lines @@
   @patch
   static Timer _createPeriodicTimer(Duration duration,
                              void callback(Timer timer)) {
     int milliseconds = duration.inMilliseconds;
     if (milliseconds < 0) milliseconds = 0;
     return new TimerImpl.periodic(milliseconds, callback);
   }
 }
 
 bool get _hasDocument => JS('String', 'typeof document') == 'object';