Change core lib, dart2js, and more for new optional parameters syntax

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 _HttpHeaders implements HttpHeaders {
   _HttpHeaders() : _headers = new Map<String, List<String>>();
 
   List<String> operator[](String name) {
     name = name.toLowerCase();
     return _headers[name];
@@ skipping 1109 matching lines @@
 
 class _HttpInputStream extends _BaseDataInputStream implements InputStream {
   _HttpInputStream(_HttpRequestResponseBase this._requestOrResponse) {
     _checkScheduleCallbacks();
   }
 
   int available() {
     return _requestOrResponse._streamAvailable();
   }
 
-  void pipe(OutputStream output, [bool close = true]) {
+  void pipe(OutputStream output, {bool close: true}) {
     _pipe(this, output, close: close);
   }
 
   List<int> _read(int bytesToRead) {
     List<int> result = _requestOrResponse._streamRead(bytesToRead);
     _checkScheduleCallbacks();
     return result;
   }
 
   void set onError(void callback(e)) {
@@ skipping 1150 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;
 }