Avoid using chunked transfer encoding when the HTTP verision is 1.0.

runtime/bin/http.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.
 
 /**
  * HTTP status codes.
  */
 interface HttpStatus {
   static final int CONTINUE = 100;
   static final int SWITCHING_PROTOCOLS = 101;
@@ skipping 334 matching lines @@
   /**
    * Returns the request headers.
    */
   HttpHeaders get headers();
 
   /**
    * Returns the input stream for the request. This is used to read
    * the request data.
    */
   InputStream get inputStream();
+
+  /**
+   * Returns the HTTP protocol version used in the request. This will
+   * be "1.0" or "1.1".
+   */
+  String get protocolVersion();
 }
 
 
 /**
  * HTTP response to be send back to the client.
  */
 interface HttpResponse default _HttpResponse {
   /**
    * Gets and sets the content length of the response. If the size of
    * the response is not known in advance set the content length to
@@ skipping 301 matching lines @@
 class RedirectLimitExceeded extends RedirectException {
   const RedirectLimitExceeded(List<RedirectInfo> redirects)
       : super("Redirect limit exceeded", redirects);
 }
 
 
 class RedirectLoop extends RedirectException {
   const RedirectLoop(List<RedirectInfo> redirects)
       : super("Redirect loop detected", redirects);
 }