Fix type warnings and remove unimplemented stuff from HttpClient interface.

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 353 matching lines @@
    */
   int port;
 
   /**
    * Gets and sets the content type. Note that the content type in the
    * header will only be updated if this field is set
    * directly. Mutating the returned current value will have no
    * effect.
    */
   ContentType contentType;
+
+  /**
+   * Gets and sets the content length header value.
+   */
+  int contentLength;
+
+  /**
+   * Gets and sets the persistent connection header value.
+   */
+  bool persistentConnection;
 }
 
 
 /**
  * Representation of a header value in the form:
  *
  *   [:value; parameter1=value1; parameter2=value2:]
  *
  * [HeaderValue] can be used to conveniently build and parse header
  * values on this form.
@@ skipping 416 matching lines @@
    * continue normally.
    */
   set authenticate(Future<bool> f(Uri url, String scheme, String realm));
 
   /**
    * Add credentials to be used for authorizing HTTP requests.
    */
   void addCredentials(Uri url, String realm, HttpClientCredentials credentials);
 
   /**
-   * If [sendClientCertificate] is set to true, authenticate with a client
-   * certificate when connecting with an HTTPS server that requests one.
-   * Select the certificate from the certificate database that matches
-   * the authorities listed by the HTTPS server as valid.
-   * If [clientCertificate] is set, send the certificate with that nickname
-   * instead.
-   */
-  set sendClientCertificate(bool send);
-
-  /**
-   * If [clientCertificate] is non-null and [sendClientCertificate] is true,
-   * use [clientCertificate] to select the certificate to send from the
-   * certificate database, looking it up by its nickname.
-   */
-  set clientCertificate(String nickname);
-
-  /**
    * Sets the function used to resolve the proxy server to be used for
    * opening a HTTP connection to the specified [url]. If this
    * function is not set, direct connections will always be used.
    *
    * The string returned by [f] must be in the format used by browser
    * PAC (proxy auto-config) scripts. That is either
    *
    *   "DIRECT"
    *
    * for using a direct connection or
@@ skipping 288 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);
 }