Change IllegalArgumentException to ArgumentError.

utils/template/utils.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.
 
 // Collection<T> supports most of the ES 5 Array methods, but it's missing
 // map and reduce.
 
 // TODO(jmesserly): we might want a version of this that return an iterable,
 // however JS, Python and Ruby versions are all eager.
 List map(Iterable source, mapper(source)) {
@@ skipping 26 matching lines @@
 }
 
 List zip(Iterable left, Iterable right, mapper(left, right)) {
   List result = new List();
   var x = left.iterator();
   var y = right.iterator();
   while (x.hasNext() && y.hasNext()) {
     result.add(mapper(x.next(), y.next()));
   }
   if (x.hasNext() || y.hasNext()) {
-    throw new IllegalArgumentException();
+    throw new ArgumentError();
   }
   return result;
 }