| Index: sdk/lib/io/file_impl.dart | 
| =================================================================== | 
| --- sdk/lib/io/file_impl.dart	(revision 24619) | 
| +++ sdk/lib/io/file_impl.dart	(working copy) | 
| @@ -783,7 +783,7 @@ | 
|  | 
| _BufferAndStart result; | 
| try { | 
| -      result = _ensureFastAndSerializableData(buffer, start, end); | 
| +      result = _ensureFastAndSerializableByteData(buffer, start, end); | 
| } catch (e) { | 
| return new Future.error(e); | 
| } | 
| @@ -816,7 +816,7 @@ | 
| if (end == start) return; | 
| _checkReadWriteListArguments(buffer.length, start, end); | 
| _BufferAndStart bufferAndStart = | 
| -        _ensureFastAndSerializableData(buffer, start, end); | 
| +        _ensureFastAndSerializableByteData(buffer, start, end); | 
| var result = _writeFrom(_id, | 
| bufferAndStart.buffer, | 
| bufferAndStart.start, | 
|  |