Add timeouts to HttpClient.

sdk/lib/io/http.dart

 // 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.
 
 part of dart.io;
 
 /**
  * HTTP status codes.
  */
 abstract class HttpStatus {
@@ skipping 855 matching lines @@
  * the use of proxies all together set the [findProxy] property to
  * [:null:].
  *
  *     HttpClient client = new HttpClient();
  *     client.findProxy = null;
  */
 abstract class HttpClient {
   static const int DEFAULT_HTTP_PORT = 80;
   static const int DEFAULT_HTTPS_PORT = 443;
 
+  /**
+   * Get and set the idle timeout of non-active persistent (keep-alive)
+   * connections. The default value is 15 seconds.
+   */
+  Duration idleTimeout;
+
   factory HttpClient() => new _HttpClient();
 
   /**
    * Opens a HTTP connection. The returned [HttpClientRequest] is used to
    * fill in the content of the request before sending it. The 'host' header for
    * the request will be set to the value [host]:[port]. This can be overridden
    * through the [HttpClientRequest] interface before the request is sent.
    * NOTE if [host] is an IP address this will still be set in the 'host'
    * header.
    */
@@ skipping 478 matching lines @@
 class RedirectLimitExceededException extends RedirectException {
   const RedirectLimitExceededException(List<RedirectInfo> redirects)
       : super("Redirect limit exceeded", redirects);
 }
 
 
 class RedirectLoopException extends RedirectException {
   const RedirectLoopException(List<RedirectInfo> redirects)
       : super("Redirect loop detected", redirects);
 }