Fix void foo(..) => ... to use { } instead.

sdk/lib/convert/chunked_conversion.dart

Index: sdk/lib/convert/chunked_conversion.dart
diff --git a/sdk/lib/convert/chunked_conversion.dart b/sdk/lib/convert/chunked_conversion.dart
index d450c75c06d36f0bef9daaa248e040042de97735..a36c50555bb30f7e3d78a66bd256c9632701b8ca 100644
--- a/sdk/lib/convert/chunked_conversion.dart
+++ b/sdk/lib/convert/chunked_conversion.dart
@@ -130,11 +130,11 @@ class _ConverterStreamEventSink<S, T> implements EventSink<S> {
       : this._eventSink = sink,
         _chunkedSink = converter.startChunkedConversion(sink);
 
-  void add(S o) => _chunkedSink.add(o);
+  void add(S o) { _chunkedSink.add(o); }
   void addError(Object error, [StackTrace stackTrace]) {
     _eventSink.addError(error, stackTrace);
   }
-  void close() => _chunkedSink.close();
+  void close() { _chunkedSink.close(); }
 }
 
 /**