ChromeOS Gaia: SAML password confirmation dialog

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

 /* Copyright 2015 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.
  */
 
 Polymer('gaia-input-form', (function() {
   return {
     onButtonClicked: function() {
       this.fire('submit');
     },
 
     onKeyDown: function(e) {
       if (e.keyCode == 13 && !this.$.button.disabled)
         this.onButtonClicked();
-    }
+    },
+
+    set disabled(value) {
+      var controls = this.querySelectorAll(
+          ':host /deep/ [role="button"], :host /deep/ [is="core-input"]');
+      for (var i = 0, control; control = controls[i]; ++i)
+        control.disabled = value;
+    },
   };
 })());