Added usage of ScreenContext in EulaScreen.

chrome/browser/resources/chromeos/login/oobe_screen_eula.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 eula screen implementation.
  */
 
 login.createScreen('EulaScreen', 'eula', function() {
+  var CONTEXT_KEY_USAGE_STATS_ENABLED = 'usageStatsEnabled';
+
   return {
     /** @override */
     decorate: function() {
       $('eula-chrome-credits-link').hidden = true;
       $('eula-chromeos-credits-link').hidden = true;
       $('stats-help-link').addEventListener('click', function(event) {
         chrome.send('eulaOnLearnMore');
       });
       $('installation-settings-link').addEventListener(
           'click', function(event) {
             chrome.send('eulaOnInstallationSettingsPopupOpened');
             $('popup-overlay').hidden = false;
             $('installation-settings-ok-button').focus();
           });
       $('installation-settings-ok-button').addEventListener(
           'click', function(event) {
             $('popup-overlay').hidden = true;
           });
       // Do not allow focus leaving the overlay.
       $('popup-overlay').addEventListener('focusout', function(event) {
         // WebKit does not allow immediate focus return.
         window.setTimeout(function() {
           // TODO(ivankr): focus cycling.
           $('installation-settings-ok-button').focus();
         }, 0);
         event.preventDefault();
       });
+
+      var self = this;
+      $('usage-stats').addEventListener('click', function(event) {
+        self.context.set(CONTEXT_KEY_USAGE_STATS_ENABLED,
+                         $('usage-stats').checked);
+        self.commitContextChanges();
+        event.stopPropagation();
+      });
     },
 
     /**
      * Event handler that is invoked when 'chrome://terms' is loaded.
      */
     onFrameLoad: function() {
       $('accept-button').disabled = false;
       $('eula').classList.remove('eula-loading');
       // Initially, the back button is focused and the accept button is
       // disabled.
@@ skipping 25 matching lines @@
     /**
      * Buttons in oobe wizard's button strip.
      * @type {Array} Array of Buttons.
      */
     get buttons() {
       var buttons = [];
 
       var backButton = this.ownerDocument.createElement('button');
       backButton.id = 'back-button';
       backButton.textContent = loadTimeData.getString('back');
+
+      var self = this;
       backButton.addEventListener('click', function(e) {
-        chrome.send('eulaOnExit', [false, $('usage-stats').checked]);
+        chrome.send('eulaBackButtonClicked');
         e.stopPropagation();
       });
       buttons.push(backButton);
 
       var acceptButton = this.ownerDocument.createElement('button');
       acceptButton.id = 'accept-button';
       acceptButton.disabled = true;
       acceptButton.classList.add('preserve-disabled-state');
       acceptButton.textContent = loadTimeData.getString('acceptAgreement');
       acceptButton.addEventListener('click', function(e) {
         $('eula').classList.add('loading');  // Mark EULA screen busy.
-        chrome.send('eulaOnExit', [true, $('usage-stats').checked]);
+        chrome.send('eulaAcceptButtonClicked');
         e.stopPropagation();
       });
       buttons.push(acceptButton);
 
       return buttons;
     },
 
     /**
      * Returns a control which should receive an initial focus.
      */
@@ skipping 24 matching lines @@
       if ($('cros-eula-frame').src) {
         $('cros-eula-frame').src = $('cros-eula-frame').src;
       }
       if ($('oem-eula-frame').src) {
         $('oem-eula-frame').src = $('oem-eula-frame').src;
       }
     }
   };
 });