ChromeOS MD-OOBE: "Back" button for EULA screen.

chrome/browser/resources/chromeos/login/oobe_eula.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.
 
 /**
  * @fileoverview Polymer element for displaying material design Terms Of Service
  * screen.
  */
 
 Polymer({
@@ skipping 83 matching lines @@
   },
 
   /**
    * On-tap event handler for stats-help-link.
    *
    * * @private
    */
   onUsageStatsHelpLinkClicked_: function() {
     chrome.send('eulaOnLearnMore');
   },
+
+  /**
+   * On-tap event handler for back button.
+   *
+   * * @private

[xiyuan, 2016/12/01 17:40:54]

remove the extra '*' and space.

[Alexander Alekseev, 2016/12/01 23:20:08]

Done.

+   */
+  onEulaBackButtonPressed_: function() {
+    chrome.send('login.EulaScreen.userActed', ['back-button']);
+  },
 });