Fix authenticator.js history.replaceState call.

chrome/browser/resources/gaia_auth_host/authenticator.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 <include src="saml_handler.js">
 
 /**
  * @fileoverview An UI component to authenciate to Chrome. The component hosts
  * IdP web pages in a webview. A client who is interested in monitoring
  * authentication events should pass a listener object of type
@@ skipping 235 matching lines @@
   /**
     * Manually updates the history. Invoked upon completion of a webview
     * navigation.
     * @param {string} url Request URL.
     * @private
     */
   Authenticator.prototype.updateHistoryState_ = function(url) {
     if (history.state && history.state.url != url)
       history.pushState({url: url}, '');
     else
-      history.replaceState({url: url});
+      history.replaceState({url: url}, '');
   };
 
   /**
    * Invoked when the sign-in page takes focus.
    * @param {object} e The focus event being triggered.
    * @private
    */
   Authenticator.prototype.onFocus_ = function(e) {
     this.webview_.focus();
   };
@@ skipping 259 matching lines @@
   Authenticator.AuthFlow = AuthFlow;
   Authenticator.AuthMode = AuthMode;
   Authenticator.SUPPORTED_PARAMS = SUPPORTED_PARAMS;
 
   return {
     // TODO(guohui, xiyuan): Rename GaiaAuthHost to Authenticator once the old
     // iframe-based flow is deprecated.
     GaiaAuthHost: Authenticator
   };
 });