Treat JS TypeError as Dart NSM

pkg/dev_compiler/tool/input_sdk/private/js_helper.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.
 
 library dart._js_helper;
 
 import 'dart:collection';
 
 import 'dart:_debugger' show stackTraceMapper;
 
@@ skipping 558 matching lines @@
 
 throwAbstractClassInstantiationError(className) {
   throw new AbstractClassInstantiationError(className);
 }
 
 @NoInline()
 throwConcurrentModificationError(collection) {
   throw new ConcurrentModificationError(collection);
 }
 
-class NullError extends Error implements NoSuchMethodError {
-  final String _message;
-  final String _method;
-
-  NullError(this._message, match)
-      : _method = match == null ? null : JS('', '#.method', match);
+@JsPeerInterface(name: 'TypeError')
+class NullError extends Interceptor implements NoSuchMethodError {
+  StackTrace get stackTrace => Primitives.extractStackTrace(this);
 
   String toString() {
-    if (_method == null) return 'NullError: $_message';
-    return "NullError: method not found: '$_method' on null";
+    // TODO(vsm): Distinguish between null reference errors and other
+    // TypeErrors.  We should not get non-null TypeErrors from DDC code,
+    // but we may from native JavaScript.
+    var message = JS('String', '#.message', this);
+    return "NullError: $message";
   }
 }
 
 class JsNoSuchMethodError extends Error implements NoSuchMethodError {
   final String _message;
   final String _method;
   final String _receiver;
 
   JsNoSuchMethodError(this._message, match)
       : _method = match == null ? null : JS('String|Null', '#.method', match),
@@ skipping 316 matching lines @@
   // we have no way of telling the compiler yet, so it will generate an extra
   // layer of indirection that wraps the SyncIterator.
   _jsIterator() => JS('', '#(...#)', _generator, _args);
 
   Iterator<E> get iterator => new SyncIterator<E>(_jsIterator());
 }
 
 class BooleanConversionAssertionError extends AssertionError {
   toString() => 'Failed assertion: boolean expression must not be null';
 }