Clear the login webview when SAML flow is canceled

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.
  */
 
 login.createScreen('GaiaSigninScreen', 'gaia-signin', function() {
   // GAIA animation guard timer. Started when GAIA page is loaded
@@ skipping 575 matching lines @@
       params.doSamlRedirect =
           (this.screenMode_ == ScreenMode.SAML_INTERSTITIAL);
 
       this.gaiaAuthParams_ = params;
       switch (this.screenMode_) {
         case ScreenMode.DEFAULT:
           this.loadGaiaAuthHost_(false /* doSamlRedirect */);
           break;
 
         case ScreenMode.OFFLINE:
+          this.gaiaAuthHost_.resetStates();

[emaxx, 2016/05/23 15:00:49]

This (plus the new line 601) resolves the issue that the SAML webview was still
working in the background, when the network becomes disconnected.

The network disconnection results in loading the first screen, which is
performed by the GaiaSigninScreen.loadAuthExtension method call. With this
patch, this results in calling resetStates() on all code paths (note: when
this.screenMode_==ScreenMode.DEFAULT, GaiaSigninScreen.loadGaiaAuthHost_ will
call resetStates itself).

           this.loadOffline(params);
           break;
 
         case ScreenMode.SAML_INTERSTITIAL:
+          this.gaiaAuthHost_.resetStates();
           $('saml-interstitial').domain = data.enterpriseDomain;
           if (this.loading)
             this.loading = false;
           // This event is for the browser tests.
           $('saml-interstitial').fire('samlInterstitialPageReady');
           break;
       }
       this.updateControlsState();
       chrome.send('authExtensionLoaded');
     },
@@ skipping 306 matching lines @@
     },
 
     /**
      * Clears input fields and switches to input mode.
      * @param {boolean} takeFocus True to take focus.
      * @param {boolean} forceOnline Whether online sign-in should be forced.
      * If |forceOnline| is false previously used sign-in type will be used.
      */
     reset: function(takeFocus, forceOnline) {
       // Reload and show the sign-in UI if needed.
-      this.gaiaAuthHost_.resetStates_();
+      this.gaiaAuthHost_.resetStates();
       if (takeFocus) {
         if (!forceOnline && this.isOffline()) {
           // Show 'Cancel' button to allow user to return to the main screen
           // (e.g. this makes sense when connection is back).
           Oobe.getInstance().headerHidden = false;
           $('login-header-bar').signinUIState = SIGNIN_UI_STATE.GAIA_SIGNIN;
           // Do nothing, since offline version is reloaded after an error comes.
         } else {
           Oobe.showSigninUI();
         }
@@ skipping 103 matching lines @@
       this.classList.toggle('whitelist-error', show);
       this.loading = !show;
 
       if (!show)
         Oobe.showSigninUI();
 
       this.updateControlsState();
     }
   };
 });