Fix HTTP library issues reported by dart2js

runtime/bin/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 _HttpRequestResponseBase {
   _HttpRequestResponseBase(_HttpConnectionBase this._httpConnection)
       : _contentLength = -1,
         _keepAlive = false,
         _headers = new Map();
 
@@ skipping 276 matching lines @@
     if (_state != DONE) {
       _httpConnection.outputStream.onNoPendingWrites = callback;
     }
   }
 
   void _streamSetCloseHandler(callback()) {
     // TODO(sgjesse): Handle this.
   }
 
   void _streamSetErrorHandler(callback(Exception e)) {
-    _streamErrorHandler = callback
+    _streamErrorHandler = callback;
   }
 
   String _findReasonPhrase(int statusCode) {
     if (_reasonPhrase != null) {
       return _reasonPhrase;
     }
 
     switch (statusCode) {
       case HttpStatus.CONTINUE: return "Continue";
       case HttpStatus.SWITCHING_PROTOCOLS: return "Switching Protocols";
@@ skipping 889 matching lines @@
     sockets.addFirst(socketConn);
     socketConn._markReturned();
   }
 
   Function _onOpen;
   Map<String, Queue<_SocketConnection>> _openSockets;
   Set<_SocketConnection> _activeSockets;
   Timer _evictionTimer;
   bool _shutdown;  // Has this HTTP client been shutdown?
 }