fixes #215, removes special case for length

lib/runtime/dart/_isolate_helper.js

 dart.library('dart/_isolate_helper', null, /* Imports */[
   'dart/core',
   'dart/_native_typed_data',
   'dart/_interceptors',
   'dart/_js_helper',
   'dart/isolate',
   'dart/_foreign_helper',
   'dart/_js_embedded_names',
   'dart/collection',
   'dart/async'
@@ skipping 88 matching lines @@
         return ["extendable", serialized];
       if (dart.is(indexable, _interceptors.JSMutableArray))
         return ["mutable", serialized];
       if (dart.is(indexable, _interceptors.JSArray))
         return ["const", serialized];
       this.unsupported(indexable, "Can't serialize indexable: ");
       return null;
     }
     serializeArray(x) {
       let serialized = [];
-      serialized.length = x.length;
-      for (let i = 0; dart.notNull(i) < dart.notNull(x.length); i = dart.notNull(i) + 1) {
+      serialized[dartx.length] = x[dartx.length];
+      for (let i = 0; dart.notNull(i) < dart.notNull(x[dartx.length]); i = dart.notNull(i) + 1) {
         serialized[dartx.set](i, this.serialize(x[dartx.get](i)));
       }
       return serialized;
     }
     serializeArrayInPlace(x) {
-      for (let i = 0; dart.notNull(i) < dart.notNull(x.length); i = dart.notNull(i) + 1) {
+      for (let i = 0; dart.notNull(i) < dart.notNull(x[dartx.length]); i = dart.notNull(i) + 1) {
         x[dartx.set](i, this.serialize(x[dartx.get](i)));
       }
       return x;
     }
     serializeMap(x) {
       let serializeTearOff = dart.bind(this, 'serialize');
       return ['map', x.keys[dartx.map](dart.as(serializeTearOff, __CastType0))[dartx.toList](), x.values[dartx.map](dart.as(serializeTearOff, dart.functionType(core.Object, [dart.bottom])))[dartx.toList]()];
     }
     serializeJSObject(x) {
       if (!!x.constructor && x.constructor !== Object) {
         this.unsupported(x, "Only plain JS Objects are supported:");
       }
       let keys = dart.as(Object.keys(x), core.List);
       let values = [];
-      values.length = keys.length;
-      for (let i = 0; dart.notNull(i) < dart.notNull(keys.length); i = dart.notNull(i) + 1) {
+      values[dartx.length] = keys[dartx.length];
+      for (let i = 0; dart.notNull(i) < dart.notNull(keys[dartx.length]); i = dart.notNull(i) + 1) {
         values[dartx.set](i, this.serialize(x[keys[dartx.get](i)]));
       }
       return ['js-object', keys, values];
     }
     serializeWorkerSendPort(x) {
       if (dart.notNull(this[_serializeSendPorts])) {
         return ['sendport', x[_workerId], x[_isolateId], x[_receivePortId]];
       }
       return ['raw sendport', x];
     }
@@ skipping 132 matching lines @@
       this.deserializedObjects[dartx.add](result);
       return result;
     }
     deserializeTypedData(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'typed'));
       let result = dart.as(dart.dindex(x, 1), _native_typed_data.NativeTypedData);
       this.deserializedObjects[dartx.add](result);
       return result;
     }
     deserializeArrayInPlace(x) {
-      for (let i = 0; dart.notNull(i) < dart.notNull(x.length); i = dart.notNull(i) + 1) {
+      for (let i = 0; dart.notNull(i) < dart.notNull(x[dartx.length]); i = dart.notNull(i) + 1) {
         x[dartx.set](i, this.deserialize(x[dartx.get](i)));
       }
       return x;
     }
     deserializeFixed(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'fixed'));
       let result = dart.as(dart.dindex(x, 1), core.List);
       this.deserializedObjects[dartx.add](result);
       return _interceptors.JSArray.markFixed(this.deserializeArrayInPlace(dart.as(result, _interceptors.JSArray)));
     }
@@ skipping 15 matching lines @@
       this.deserializedObjects[dartx.add](result);
       return _interceptors.JSArray.markFixed(this.deserializeArrayInPlace(dart.as(result, _interceptors.JSArray)));
     }
     deserializeMap(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'map'));
       let keys = dart.as(dart.dindex(x, 1), core.List);
       let values = dart.as(dart.dindex(x, 2), core.List);
       let result = dart.map();
       this.deserializedObjects[dartx.add](result);
       keys = keys[dartx.map](dart.bind(this, 'deserialize'))[dartx.toList]();
-      for (let i = 0; dart.notNull(i) < dart.notNull(keys.length); i = dart.notNull(i) + 1) {
+      for (let i = 0; dart.notNull(i) < dart.notNull(keys[dartx.length]); i = dart.notNull(i) + 1) {
         result.set(keys[dartx.get](i), this.deserialize(values[dartx.get](i)));
       }
       return result;
     }
     deserializeSendPort(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'sendport'));
       let managerId = dart.as(dart.dindex(x, 1), core.int);
       let isolateId = dart.as(dart.dindex(x, 2), core.int);
       let receivePortId = dart.as(dart.dindex(x, 3), core.int);
       let result = null;
@@ skipping 16 matching lines @@
       let result = dart.as(dart.dindex(x, 1), isolate.SendPort);
       this.deserializedObjects[dartx.add](result);
       return result;
     }
     deserializeJSObject(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'js-object'));
       let keys = dart.as(dart.dindex(x, 1), core.List);
       let values = dart.as(dart.dindex(x, 2), core.List);
       let o = {};
       this.deserializedObjects[dartx.add](o);
-      for (let i = 0; dart.notNull(i) < dart.notNull(keys.length); i = dart.notNull(i) + 1) {
+      for (let i = 0; dart.notNull(i) < dart.notNull(keys[dartx.length]); i = dart.notNull(i) + 1) {
         o[keys[dartx.get](i)] = this.deserialize(values[dartx.get](i));
       }
       return o;
     }
     deserializeClosure(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'function'));
       let name = dart.as(dart.dindex(x, 1), core.String);
       let result = dart.as(IsolateNatives._getJSFunctionFromName(name), core.Function);
       this.deserializedObjects[dartx.add](result);
       return result;
@@ skipping 1183 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;
 });