ChromeOS: Implement EULA screen of material design OOBE.

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({
+  is: 'oobe-eula-md',
+
+  properties: {
+    /**
+     * Shows "Loading..." section.
+     */
+    eulaLoadingScreenShown: {
+      type: Boolean,
+      value: false,
+    },
+
+    /**
+     * Shows Terms Of Service frame.
+     */
+    eulaScreenShown: {
+      type: Array,
+    },
+
+    /**
+     * "Accepot and continue" button is disabled until content is loaded.
+     */
+    acceptButtonDisabled: {
+      type: Boolean,
+      value: true,
+    },
+  },
+
+  /**
+   * Event handler that is invoked when 'chrome://terms' is loaded.
+   */
+  onFrameLoad_: function() {
+    this.acceptButtonDisabled = false;
+  },
+
+  /**
+   * This is called when strings are updated.
+   */
+  updateLocalizedContent: function(event) {
+    // This forces frame to reload.
+    this.$.crosEulaFrame.src = this.$.crosEulaFrame.src;
+  },
+
+  /**
+   * This is 'on-tap' event handler for "Accept' button.

[michaelpg, 2016/08/15 16:16:49]

nit: matching quotes

[Alexander Alekseev, 2016/08/15 19:36:43]

Done.

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