| Index: sdk/lib/_internal/compiler/implementation/lib/js_string.dart | 
| diff --git a/sdk/lib/_internal/compiler/implementation/lib/js_string.dart b/sdk/lib/_internal/compiler/implementation/lib/js_string.dart | 
| index a87c6116302843abcc182ec05127a313a0649b8c..2086cd9aa766749f0b7c4e30ea9a52ef4906b2e1 100644 | 
| --- a/sdk/lib/_internal/compiler/implementation/lib/js_string.dart | 
| +++ b/sdk/lib/_internal/compiler/implementation/lib/js_string.dart | 
| @@ -89,7 +89,7 @@ class JSString implements String { | 
| List<int> get charCodes  { | 
| List<int> result = new List<int>(length); | 
| for (int i = 0; i < length; i++) { | 
| -      result[i] = charCodeAt(i); | 
| +      result[i] = JS('int', '#.charCodeAt(#)', this, i); | 
| } | 
| return result; | 
| } | 
|  |