Try to send EndStreamFlag together with headers (if possible)

lib/src/streams/stream_handler.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library http2.src.stream_handler;
 
 import 'dart:async';
 import 'dart:math';
 
 import '../../transport.dart';
@@ skipping 179 matching lines @@
 
   bool _isPeerInitiatedStream(int streamId) {
     bool isServerStreamId = streamId.isEven;
     bool isLocalStream = isServerStreamId == isServer;
     return !isLocalStream;
   }
 
   TransportStream newStream(List<Header> headers, {bool endStream: false}) {
     return ensureNotTerminatedSync(() {
       var stream = newLocalStream();
-      _sendHeaders(stream, headers);
-      if (endStream) {
-        _handleOutgoingClose(stream);
-      }
+      _sendHeaders(stream, headers, endStream: endStream);
       return stream;
     });
   }
 
   TransportStream newLocalStream() {
     return ensureNotTerminatedSync(() {
       assert(_canCreateNewStream());
 
       if (MAX_STREAM_ID < nextStreamId) {
         throw new StateError(
@@ skipping 580 matching lines @@
     }
     stream.state = to;
   }
 
   bool _didInitiateStream(Http2StreamImpl stream) {
     int id = stream.id;
     return (isServer && id.isEven) || (!isServer && id.isOdd);
   }
 }