Fix for pub.

utils/pub/safe_http_server.dart

Index: utils/pub/safe_http_server.dart
diff --git a/utils/pub/safe_http_server.dart b/utils/pub/safe_http_server.dart
index 64adf5b8ac691f4daee8c7c56489300a8478db99..7fd522b446858f83df0aa2c292a6e2c46e2eeb4a 100644
--- a/utils/pub/safe_http_server.dart
+++ b/utils/pub/safe_http_server.dart
@@ -134,9 +134,11 @@ class _HttpResponseWrapper implements HttpResponse {
   void writeBytes(List<int> data) => _inner.writeBytes(data);
   Future<HttpResponse> consume(Stream<List<int>> stream) =>
     _inner.consume(stream);
+  Future<HttpResponse> addStream(Stream<List<int>> stream) =>
+    _inner.addStream(stream);
   Future<HttpResponse> writeStream(Stream<List<int>> stream) =>
     _inner.writeStream(stream);
-  void close() => _inner.close();
+  Future close() => _inner.close();
   void write(Object obj) => _inner.write(obj);
   void writeAll(Iterable objects) => _inner.writeAll(objects);
   void writeCharCode(int charCode) => _inner.writeCharCode(charCode);