Expands on previous function RTT to support named/optional parameters.

compiler/lib/implementation/array.dart

 // Copyright (c) 2011, 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.
 
 class ListFactory {
   factory List<E>.from(Iterable<E> other) {
+    if (other == null) {
+      throw const NullPointerException();
+    }
     List<E> list = new List<E>();
     for (final e in other) {
       list.add(e);
     }
     return list;
   }
 
   factory List<E>([int length = null]) {
     bool isFixed = true;
     if (length === null) {
@@ skipping 150 matching lines @@
 
   void addLast(T element) {
     add(element);
   }
 
   void addAll(Collection<T> elements) {
     if (_isFixed) {
       throw const UnsupportedOperationException(
           "Cannot add to a non-extendable list");
     } else {
+      if (elements == null) {
+        throw const NullPointerException();
+      }
       for (final e in elements) {
         _add(e);
       }
     }
   }
 
   void clear() {
     if (_isFixed) {
       throw const UnsupportedOperationException(
           "Cannot clear a non-extendable list");
@@ skipping 72 matching lines @@
   }
 
   static List _newList(int len) native {
     return new List(len);
   }
 
   static void _throwIndexOutOfRangeException(int index) native {
     throw new IndexOutOfRangeException(index);
   }
 }