Use Socket.read instead of Socket.readList in HTTP

tests/standalone/io/http_server_socket_test.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.
 
 #import("dart:io");
 #import("dart:isolate");
 #import("dart:math");
 
 class ExpectedDataOutputStream implements OutputStream {
   ExpectedDataOutputStream(List<int> this._data,
@@ skipping 66 matching lines @@
     Expect.isFalse(_closed);
     _closed = true;
     _onClosedInternal();
     if (asError) {
       _onError(new Exception("Socket closed unexpected"));
     } else {
       _onClosed();
     }
   }
 
+  List<int> read([int len]) {
+    var result;
+    if (len == null) {
+      result = _data;
+      _data = [];
+    } else {
+      result = new Uint8List(len);
+      readList(result, 0, len);
+    }
+    return result;
+  }
+
   int readList(List<int> buffer, int offset, int count) {
     int max = min(count, _data.length);
     buffer.setRange(offset, max, _data);
     _data = _data.getRange(max, _data.length - max);
     return max;
   }
 
   void close([bool halfClose = false]) {
     if (!halfClose && !_closed) _closeInternal();
   }
@@ skipping 115 matching lines @@
       "GET / HTTP/1.1\r\nKeep-Alive: False\r\n\r\n",
       "HTTP/1.1 200 OK\r\ntransfer-encoding: chunked\r\nconnection: close"
       "\r\n\r\n0\r\n\r\n");
 
   server.close();
 }
 
 void main() {
   testSocketClose();
 }