Host Chrome OS GAIA signin page in webview

chrome/browser/resources/chromeos/login/screen_gaia_signin.js

 // Copyright (c) 2012 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.
 
 /**
  * @fileoverview Oobe signin screen implementation.
  */
 
-<include src="../../gaia_auth_host/gaia_auth_host.js">
-
 login.createScreen('GaiaSigninScreen', 'gaia-signin', function() {
   // Gaia loading time after which error message must be displayed and
   // lazy portal check should be fired.
   /** @const */ var GAIA_LOADING_PORTAL_SUSSPECT_TIME_SEC = 7;
 
   // Maximum Gaia loading time in seconds.
   /** @const */ var MAX_GAIA_LOADING_TIME_SEC = 60;
 
   /** @const */ var HELP_TOPIC_ENTERPRISE_REPORTING = 2535613;
 
@@ skipping 61 matching lines @@
      * @private
      */
     isShowUsers_: undefined,
 
     /**
      * SAML password confirmation attempt count.
      * @type {number}
      */
     samlPasswordConfirmAttempt_: 0,
 
+    /**
+     * Whether we should show webview based signin.
+     * @type {boolean}
+     * @private
+     */
+    isWebviewSignin: false,
+
     /** @override */
     decorate: function() {
-      this.gaiaAuthHost_ = new cr.login.GaiaAuthHost($('signin-frame'));
+      this.isWebviewSignin = loadTimeData.getValue('isWebviewSignin');
+      if (this.isWebviewSignin) {
+        /**
+        * A listener class for authentication events from GaiaAuthHost.
+        * @constructor
+        * @implements {cr.login.GaiaAuthHost.Listener}
+        */
+        function GaiaAuthHostListener(gaia_screen) {
+          this.gaia_screen_ = gaia_screen;
+        }
+
+        /** @override */
+        GaiaAuthHostListener.prototype.onSuccess = function(credentials) {
+          this.gaia_screen_.onAuthCompleted_(credentials);
+        };
+
+        /** @override */
+        GaiaAuthHostListener.prototype.onReady = function(e) {
+          this.gaia_screen_.onAuthReady_();
+        };
+
+        // Replace iframe with webview.
+        var webview = this.ownerDocument.createElement('webview');
+        webview.id = 'signin-frame';
+        webview.name = 'signin-frame';
+        // TODO(dpolukhin): webview doesn't load page in hidden state,
+        // use curtain instead.
+        $('signin-frame').parentNode.replaceChild(webview, $('signin-frame'));
+        this.gaiaAuthHost_ = new cr.login.GaiaAuthHost(
+            webview, new GaiaAuthHostListener(this));
+      } else {
+        this.gaiaAuthHost_ = new cr.login.GaiaAuthHost($('signin-frame'));
+      }
       this.gaiaAuthHost_.addEventListener(
           'ready', this.onAuthReady_.bind(this));
       this.gaiaAuthHost_.confirmPasswordCallback =
           this.onAuthConfirmPassword_.bind(this);
       this.gaiaAuthHost_.noPasswordCallback =
           this.onAuthNoPassword_.bind(this);
       this.gaiaAuthHost_.insecureContentBlockedCallback =
           this.onInsecureContentBlocked_.bind(this);
       this.gaiaAuthHost_.missingGaiaInfoCallback =
           this.missingGaiaInfo_.bind(this);
       this.gaiaAuthHost_.samlApiUsedCallback =
           this.samlApiUsed_.bind(this);
       this.gaiaAuthHost_.addEventListener('authFlowChange',
           this.onAuthFlowChange_.bind(this));
 
       $('enterprise-info-hint-link').addEventListener('click', function(e) {
         chrome.send('launchHelpApp', [HELP_TOPIC_ENTERPRISE_REPORTING]);
         e.preventDefault();
       });
 
-
       this.updateLocalizedContent();
     },
 
     /**
      * Header text of the screen.
      * @type {string}
      */
     get header() {
       return loadTimeData.getString('signinScreenTitle');
     },
@@ skipping 15 matching lines @@
       chrome.send('updateOfflineLogin', [value]);
     },
 
     /**
      * Shows/hides loading UI.
      * @param {boolean} show True to show loading UI.
      * @private
      */
     showLoadingUI_: function(show) {
       $('gaia-loading').hidden = !show;
-      this.gaiaAuthHost_.frame.hidden = show;
+      if (!this.isWebviewSignin) {
+        // TODO(dpolukhin): proper implement curtain for webview signin.
+        this.gaiaAuthHost_.frame.hidden = show;
+      }
       $('signin-right').hidden = show;
       $('enterprise-info-container').hidden = show;
       $('gaia-signin-divider').hidden = show;
     },
 
     /**
      * Handler for Gaia loading suspiciously long timeout.
      * @private
      */
     onLoadingSuspiciouslyLong_: function() {
@@ skipping 478 matching lines @@
      * For more info see C++ class 'WebUILoginView' which calls this method.
      * @param {number} error Error code.
      * @param {string} url The URL that failed to load.
      */
     onFrameError: function(error, url) {
       this.error_ = error;
       chrome.send('frameLoadingCompleted', [this.error_]);
     },
   };
 });