[Signin Error Dialog] (3/3) Added the triggering code

chrome/browser/resources/signin_error/signin_error.js

+/* Copyright 2016 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. */
+
+cr.define('signin.error', function() {
+  'use strict';
+
+  function onConfirm(e) {
+    chrome.send('confirm');
+  }
+
+  function onSwitch(e) {
+    chrome.send('switch');
+  }
+
+  function onLearnMore(e) {
+    chrome.send('learnMore');
+  }
+
+  function initialize() {
+    document.addEventListener('keydown', onKeyDown);
+    $('primaryConfirmButton').addEventListener('click', onConfirm);
+    $('secondaryConfirmButton').addEventListener('click', onConfirm);
+    $('switchButton').addEventListener('click', onSwitch);
+    $('learnMoreLink').addEventListener('click', onLearnMore);
+    chrome.send('initializedWithSize', [document.body.scrollHeight]);
+    $('primaryConfirmButton').style.display = 'none';
+  }
+
+  function clearFocus() {
+    document.activeElement.blur();
+  }
+
+  function onKeyDown(e) {
+    // If the currently focused element isn't something that performs an action
+    // on "enter" being pressed and the user hits "enter", perform the default
+    // action of the dialog, which is "OK".
+    if (e.key == 'Enter' &&
+        !/^(A|PAPER-BUTTON)$/.test(document.activeElement.tagName)) {
+      $('primaryConfirmButton').click();
+      e.preventDefault();
+    }
+  }
+
+  function removeSwitchButton() {
+    $('switchButton').style.display = 'none';
+    $('secondaryConfirmButton').style.display = 'none';
+    $('primaryConfirmButton').style.display = '';
+  }
+
+  return {
+    clearFocus: clearFocus,
+    initialize: initialize,
+    removeSwitchButton: removeSwitchButton
+  };
+});
+
+document.addEventListener('DOMContentLoaded', signin.error.initialize);