Fix String.fromCharCodes to work with iterables.

sdk/lib/_internal/compiler/implementation/lib/core_patch.dart

Index: sdk/lib/_internal/compiler/implementation/lib/core_patch.dart
diff --git a/sdk/lib/_internal/compiler/implementation/lib/core_patch.dart b/sdk/lib/_internal/compiler/implementation/lib/core_patch.dart
index 1da20f6e90c14bd70e32cbfd216d45c2efffb1d7..4f051b92df2f690d69a7b668fbece9b897519fc3 100644
--- a/sdk/lib/_internal/compiler/implementation/lib/core_patch.dart
+++ b/sdk/lib/_internal/compiler/implementation/lib/core_patch.dart
@@ -193,9 +193,8 @@ patch class List<E> {
 
 
 patch class String {
-  patch factory String.fromCharCodes(List<int> charCodes) {
+  patch factory String.fromCharCodes(Iterable<int> charCodes) {
     if (!isJsArray(charCodes)) {
-      if (charCodes is !List) throw new ArgumentError(charCodes);
       charCodes = new List.from(charCodes);

[floitsch, 2013/03/05 14:14:04]

assert that it is a jsArray.
Same: maybe add comment why toList is not good enough.

     }
     return Primitives.stringFromCharCodes(charCodes);