Update to latest analyzer

lib/runtime/dart/_isolate_helper.js

 dart_library.library('dart/_isolate_helper', null, /* Imports */[
   "dart/_runtime",
   'dart/core',
   'dart/_interceptors',
   'dart/_js_helper',
   'dart/isolate',
   'dart/_foreign_helper',
   'dart/collection',
   'dart/async'
 ], /* Lazy imports */[
@@ skipping 941 matching lines @@
     static _getEventData(e) {
       return e.data;
     }
     static _processWorkerMessage(sender, e) {
       let msg = _deserializeMessage(IsolateNatives._getEventData(e));
       switch (dart.dindex(msg, 'command')) {
         case 'start':
         {
           exports._globalState.currentManagerId = dart.as(dart.dindex(msg, 'id'), core.int);
           let functionName = dart.as(dart.dindex(msg, 'functionName'), core.String);
-          let entryPoint = functionName == null ? exports._globalState.entry : dart.as(IsolateNatives._getJSFunctionFromName(functionName), core.Function);
+          let entryPoint = dart.as(functionName == null ? exports._globalState.entry : IsolateNatives._getJSFunctionFromName(functionName), core.Function);
           let args = dart.dindex(msg, 'args');
           let message = _deserializeMessage(dart.dindex(msg, 'msg'));
           let isSpawnUri = dart.dindex(msg, 'isSpawnUri');
           let startPaused = dart.dindex(msg, 'startPaused');
           let replyTo = _deserializeMessage(dart.dindex(msg, 'replyTo'));
           let context = new _IsolateContext();
           exports._globalState.topEventLoop.enqueue(context, dart.fn(() => {
             IsolateNatives._startIsolate(entryPoint, dart.as(args, core.List$(core.String)), message, dart.as(isSpawnUri, core.bool), dart.as(startPaused, core.bool), dart.as(replyTo, isolate.SendPort));
           }), 'worker-start');
           exports._globalState.currentContext = context;
@@ skipping 38 matching lines @@
         case 'error':
         {
           dart.throw(dart.dindex(msg, 'msg'));
         }
       }
     }
     static handleSpawnWorkerRequest(msg) {
       let replyPort = dart.dindex(msg, 'replyPort');
       IsolateNatives.spawn(dart.as(dart.dindex(msg, 'functionName'), core.String), dart.as(dart.dindex(msg, 'uri'), core.String), dart.as(dart.dindex(msg, 'args'), core.List$(core.String)), dart.dindex(msg, 'msg'), false, dart.as(dart.dindex(msg, 'isSpawnUri'), core.bool), dart.as(dart.dindex(msg, 'startPaused'), core.bool)).then(dart.fn(msg => {
         dart.dsend(replyPort, 'send', msg);
-      }), {onError: dart.fn(errorMessage => {
+      }, dart.dynamic, [core.List]), {onError: dart.fn(errorMessage => {
           dart.dsend(replyPort, 'send', [_SPAWN_FAILED_SIGNAL, errorMessage]);
         }, dart.dynamic, [core.String])});
     }
     static _log(msg) {
       if (dart.notNull(exports._globalState.isWorker)) {
         exports._globalState.mainManager.postMessage(_serializeMessage(dart.map({command: 'log', msg: msg})));
       } else {
         try {
           IsolateNatives._consoleLog(msg);
         } catch (e) {
@@ skipping 476 matching lines @@
   exports.leaveJsAsync = leaveJsAsync;
   exports.isWorker = isWorker;
   exports.startRootIsolate = startRootIsolate;
   exports.IsolateNatives = IsolateNatives;
   exports.RawReceivePortImpl = RawReceivePortImpl;
   exports.ReceivePortImpl = ReceivePortImpl;
   exports.TimerImpl = TimerImpl;
   exports.hasTimer = hasTimer;
   exports.CapabilityImpl = CapabilityImpl;
 });