Ensure that stack traces are propagated more often in dart:io.

sdk/lib/io/http_parser.dart

 // Copyright (c) 2013, 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.
 
 part of dart.io;
 
 // Global constants.
 class _Const {
   // Bytes for "HTTP".
   static const HTTP = const [72, 84, 84, 80];
@@ skipping 303 matching lines @@
   }
 
   void listenToStream(Stream<List<int>> stream) {
     // Listen to the stream and handle data accordingly. When a
     // _HttpIncoming is created, _dataPause, _dataResume, _dataDone is
     // given to provide a way of controlling the parser.
     // TODO(ajohnsen): Remove _dataPause, _dataResume and _dataDone and clean up
     // how the _HttpIncoming signals the parser.
     _socketSubscription = stream.listen(
         _onData,
-        onError: _onError,
+        onError: _controller.addError,
         onDone: _onDone);
   }
 
   void _parse() {
     try {
       _doParse();
     } catch (e, s) {
       _state = _State.FAILURE;
       _reportError(e, s);
     }
@@ skipping 503 matching lines @@
     } else {
       _state = _State.FAILURE;
       // Report the error through the error callback if any. Otherwise
       // throw the error.
       _reportError(new HttpException(
                   "Connection closed before full body was received"));
     }
     _controller.close();
   }
 
-  void _onError(e, [StackTrace stackTrace]) {
-    _controller.addError(e, stackTrace);
-  }
-
   String get version {
     switch (_httpVersion) {
       case _HttpVersion.HTTP10:
         return "1.0";
       case _HttpVersion.HTTP11:
         return "1.1";
     }
     return null;
   }
 
@@ skipping 177 matching lines @@
     }
   }
 
   void _reportError(error, [stackTrace]) {
     if (_socketSubscription != null) _socketSubscription.cancel();
     _state = _State.FAILURE;
     _controller.addError(error, stackTrace);
     _controller.close();
   }
 }