Clear the login webview when SAML flow is canceled

chrome/browser/resources/gaia_auth_host/authenticator.js

Index: chrome/browser/resources/gaia_auth_host/authenticator.js
diff --git a/chrome/browser/resources/gaia_auth_host/authenticator.js b/chrome/browser/resources/gaia_auth_host/authenticator.js
index 55a24f76def03b64ded67f09c3da9dd0b3ff65ca..a4a0b894ec60a11844b5d462636074cea4117e00 100644
--- a/chrome/browser/resources/gaia_auth_host/authenticator.js
+++ b/chrome/browser/resources/gaia_auth_host/authenticator.js
@@ -196,7 +196,7 @@ cr.define('cr.login', function() {
    * Reinitializes authentication parameters so that a failed login attempt
    * would not result in an infinite loop.
    */
-  Authenticator.prototype.resetStates_ = function() {

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

Removed trailing underscore, as this method is called from other classes and is
therefore public.

+  Authenticator.prototype.resetStates = function() {
     this.isLoaded_ = false;
     this.email_ = null;
     this.gaiaId_ = null;
@@ -213,6 +213,7 @@ cr.define('cr.login', function() {
     this.authFlow = AuthFlow.DEFAULT;
     this.samlHandler_.reset();
     this.videoEnabled = false;
+    this.webview_.src = 'about:blank';

[achuithb, 2016/05/24 23:29:27]

Is it worthwhile adding a short comment here about why we're doing this?

   };
 
   /**
@@ -222,7 +223,7 @@ cr.define('cr.login', function() {
    */
   Authenticator.prototype.load = function(authMode, data) {
     this.authMode = authMode;
-    this.resetStates_();
+    this.resetStates();
     // gaiaUrl parameter is used for testing. Once defined, it is never changed.
     this.idpOrigin_ = data.gaiaUrl || IDP_ORIGIN;
     this.continueUrl_ = data.continueUrl || CONTINUE_URL;
@@ -270,7 +271,7 @@ cr.define('cr.login', function() {
    * Reloads the authenticator component.
    */
   Authenticator.prototype.reload = function() {
-    this.resetStates_();
+    this.resetStates();
     this.webview_.src = this.reloadUrl_;
     this.isLoaded_ = true;
   };
@@ -703,7 +704,7 @@ cr.define('cr.login', function() {
             gapsCookie: this.newGapsCookie_ || this.gapsCookie_ || '',
           }
         }));
-    this.resetStates_();
+    this.resetStates();
   };
 
   /**