Add a stub for forgotten callback to fix master-gpl.

        handler.cancel();

    }

   /**

     * Notify the host application to handle a SSL client certificate

     * request. The host application is responsible for showing the UI

     * if desired and providing the keys. There are three ways to

     * respond: proceed(), cancel() or ignore(). Webview remembers the

     * response if proceed() or cancel() is called and does not

     * call onReceivedClientCertRequest() again for the same host and port

     * pair. Webview does not remember the response if ignore() is called.

     *

     * This method is called on the UI thread. During the callback, the

     * connection is suspended.

     *

     * The default behavior is to cancel, returning no client certificate.

     *

     * @param view The WebView that is initiating the callback

     * @param request An instance of a {@link ClientCertRequest}

     *

     * TODO(sgurun) unhide

     * @hide

     */

    public void onReceivedClientCertRequest(WebView view, ClientCertRequest request) {

        request.cancel();

    }

    /**

     * Notifies the host application that the WebView received an HTTP

     * authentication request. The host application can use the supplied