Resolve new GAIA flow's infinite loop.

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 127 matching lines @@
         'message', this.onMessageFromWebview_.bind(this), false);
     window.addEventListener(
         'focus', this.onFocus_.bind(this), false);
     window.addEventListener(
         'popstate', this.onPopState_.bind(this), false);
   }
 
   Authenticator.prototype = Object.create(cr.EventTarget.prototype);
 
   /**
+   * Reinitializes authentication parameters so that a failed login attempt
+   * would not result in an infinite loop.
+   */
+  Authenticator.prototype.clearCredentials_ = function() {
+    this.email_ = null;
+    this.gaiaId_ = null;
+    this.password_ = null;
+    this.oauth_code_ = null;
+    this.chooseWhatToSync_ = false;
+    this.skipForNow_ = false;
+    this.sessionIndex_ = null;
+    this.trusted_ = true;
+    this.authFlow = AuthFlow.DEFAULT;
+    this.samlHandler_.reset();
+    this.loaded_ = false;
+  };
+
+  /**
    * Loads the authenticator component with the given parameters.
    * @param {AuthMode} authMode Authorization mode.
    * @param {Object} data Parameters for the authorization flow.
    */
   Authenticator.prototype.load = function(authMode, data) {
+    this.clearCredentials_();
     this.idpOrigin_ = data.gaiaUrl || IDP_ORIGIN;
     this.continueUrl_ = data.continueUrl || CONTINUE_URL;
     this.continueUrlWithoutParams_ =
         this.continueUrl_.substring(0, this.continueUrl_.indexOf('?')) ||
         this.continueUrl_;
     this.isConstrainedWindow_ = data.constrained == '1';
     this.isMinuteMaidChromeOS = data.isMinuteMaidChromeOS;
 
     this.initialFrameUrl_ = this.constructInitialFrameUrl_(data);
     this.reloadUrl_ = data.frameUrl || this.initialFrameUrl_;
-    this.authFlow = AuthFlow.DEFAULT;
-    this.samlHandler_.reset();
     // Don't block insecure content for desktop flow because it lands on
     // http. Otherwise, block insecure content as long as gaia is https.
     this.samlHandler_.blockInsecureContent = authMode != AuthMode.DESKTOP &&
         this.idpOrigin_.indexOf('https://') == 0;
 
     this.webview_.src = this.reloadUrl_;
-
-    this.loaded_ = false;
   };
 
   /**
    * Reloads the authenticator component.
    */
   Authenticator.prototype.reload = function() {
+    this.clearCredentials_();
     this.webview_.src = this.reloadUrl_;
-    this.authFlow = AuthFlow.DEFAULT;
-    this.samlHandler_.reset();
-    this.loaded_ = false;
   };
 
   Authenticator.prototype.constructInitialFrameUrl_ = function(data) {
     var url = this.idpOrigin_ + (data.gaiaPath || IDP_PATH);
 
     if (this.isMinuteMaidChromeOS) {
       if (data.chromeType)
         url = appendParam(url, 'chrometype', data.chromeType);
       if (data.clientId)
         url = appendParam(url, 'client_id', data.clientId);
@@ skipping 333 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
   };
 });