Improve the error-propagation on socket streams

tests/standalone/io/http_server_early_client_close_test.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
 import "dart:async";
 import "dart:io";
 import "dart:isolate";
 
 void sendData(List<int> data, int port) {
   Socket socket = new Socket("127.0.0.1", port);
   socket.onConnect = () {
@@ skipping 41 matching lines @@
     sendData(d, server.port);
 
     return c.future;
   }
 
   final data;
   final String exception;
   final bool expectRequest;
 }
 
-void testEarlyClose() {
+void testEarlyClose1() {
   List<EarlyCloseTest> tests = new List<EarlyCloseTest>();
   void add(Object data, String exception, {bool expectRequest: false}) {
     tests.add(new EarlyCloseTest(data, exception, expectRequest));
   }
   // The empty packet is valid.
 
   // Close while sending header
   String message = "Connection closed before full request header was received";
   add("G", message);
   add("GET /", message);
@@ skipping 14 matching lines @@
   void runTest(Iterator it) {
     if (it.moveNext()) {
       it.current.execute(server).then((_) => runTest(it));
     } else {
       server.close();
     }
   }
   runTest(tests.iterator);
 }
 
+testEarlyClose2() {
+  var server = new HttpServer();
+  server.listen("127.0.0.1", 0);
+  server.onError = (e) { /* ignore */ };
+  server.defaultRequestHandler = (request, response) {
+    String name = new Options().script;
+    new File(name).openInputStream().pipe(response.outputStream);
+  };
+
+  var count = 0;
+  var makeRequest;
+  makeRequest = () {
+    Socket socket = new Socket("127.0.0.1", server.port);
+    socket.onConnect = () {
+      var data = "GET / HTTP/1.1\r\nContent-Length: 0\r\n\r\n".charCodes;
+      socket.writeList(data, 0, data.length);
+      socket.close();
+      if (++count < 10) {
+        makeRequest();
+      } else {
+        server.close();
+      }
+    };
+  };
+
+  makeRequest();
+}
+
 void main() {
-  testEarlyClose();
+  testEarlyClose1();
+  testEarlyClose2();
 }