Do *not* report connection reset by peer as an error on an http server

sdk/lib/io/http_impl.dart

 // Copyright (c) 2012, 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.
 
 class _HttpHeaders implements HttpHeaders {
   _HttpHeaders() : _headers = new Map<String, List<String>>();
 
   List<String> operator[](String name) {
     name = name.toLowerCase();
     return _headers[name];
@@ skipping 1395 matching lines @@
         _request._streamErrorHandler(e);
       }
       if (_response != null && _response._streamErrorHandler != null) {
         _response._streamErrorHandler(e);
       }
     }
 
     // If currently not processing any request close the socket when
     // we are done writing the response.
     if (_httpParser.isIdle) {
+      // If the httpParser is idle and we get an error from the
+      // connection we deal with that as a closed connection and not
+      // as an error. When the client disappears we get a connection
+      // reset by peer and that is OK.
       if (e != null) {
-        onError(e);
+        onClosed();
       } else {
         _socket.outputStream.onClosed = () {
           _destroy();
           onClosed();
         };
         // If the client closes and we are done writing the response
         // the connection should be closed.
         if (_response == null) _close();
       }
     } else {
@@ skipping 1228 matching lines @@
 
 
 class _RedirectInfo implements RedirectInfo {
   const _RedirectInfo(int this.statusCode,
                       String this.method,
                       Uri this.location);
   final int statusCode;
   final String method;
   final Uri location;
 }