move => bind this workaround to js_ast

lib/runtime/dart/isolate.js

 var isolate;
 (function(exports) {
   'use strict';
   class Capability extends core.Object {
     Capability() {
       return new _isolate_helper.CapabilityImpl();
     }
   }
   class IsolateSpawnException extends core.Object {
     IsolateSpawnException(message) {
@@ skipping 118 matching lines @@
     get errors() {
       let controller = null;
       let port = null;
       // Function handleError: (dynamic) → void
       function handleError(message) {
         let errorDescription = dart.as(dart.dindex(message, 0), core.String);
         let stackDescription = dart.as(dart.dindex(message, 1), core.String);
         let error = new RemoteError(errorDescription, stackDescription);
         controller.addError(error, error.stackTrace);
       }
-      controller = new async.StreamController.broadcast({sync: true, onListen: (() => {
+      controller = new async.StreamController.broadcast({
+        sync: true,
+        onListen: (() => {
           port = new RawReceivePort(handleError);
           this.addErrorListener(port.sendPort);
-        }).bind(this), onCancel: (() => {
+        }).bind(this),
+        onCancel: (() => {
           this.removeErrorListener(port.sendPort);
           port.close();
           port = null;
-        }).bind(this)});
+        }).bind(this)
+      });
       return controller.stream;
     }
   }
   Isolate.IMMEDIATE = 0;
   Isolate.BEFORE_NEXT_EVENT = 1;
   Isolate.AS_EVENT = 2;
   dart.defineLazyProperties(Isolate, {
     get _currentIsolateCache() {
       return _isolate_helper.IsolateNatives.currentIsolate;
     }
@@ skipping 52 matching lines @@
   _RemoteStackTrace[dart.implements] = () => [core.StackTrace];
   // Exports:
   exports.Capability = Capability;
   exports.IsolateSpawnException = IsolateSpawnException;
   exports.Isolate = Isolate;
   exports.SendPort = SendPort;
   exports.ReceivePort = ReceivePort;
   exports.RawReceivePort = RawReceivePort;
   exports.RemoteError = RemoteError;
 })(isolate || (isolate = {}));