| Index: lib/compiler/implementation/lib/mock.dart | 
| diff --git a/lib/compiler/implementation/lib/mock.dart b/lib/compiler/implementation/lib/mock.dart | 
| index 6722d9172ae493059244cc14487a398c0d07a02a..ef49c989286310f620930dea49efb8f315a74753 100644 | 
| --- a/lib/compiler/implementation/lib/mock.dart | 
| +++ b/lib/compiler/implementation/lib/mock.dart | 
| @@ -6,11 +6,6 @@ | 
|  | 
| // TODO(ahe): Remove this file. | 
|  | 
| -void assert(condition) { | 
| -  if (condition is Function) condition = condition(); | 
| -  if (!condition) throw new AssertionError(); | 
| -} | 
| - | 
| // TODO(ahe): Not sure ByteArray belongs in the core library. | 
| interface Uint8List extends List default _InternalByteArray { | 
| Uint8List(int length); | 
|  |