CrOS Settings: Add skeleton page for multidevice section.

chrome/browser/resources/settings/multidevice_page/multidevice_page.js

+// Copyright 2017 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
+ * Settings page for managing multidevice features.
+ */
+
+Polymer({
+  is: 'settings-multidevice-page',
+
+  properties: {
+    /** Preferences state. */
+    prefs: {
+      type: Object,
+      notify: true,
+    },
+
+    /**
+     * Reflects the current state of the toggle buttons (in this page and the
+     * subpage). This will be set when the user changes the toggle.
+     * @private
+     */
+    smsConnectToggleState_: {
+      type: Boolean,
+      observer: 'smsConnectToggleStateChanged_',
+    },
+  },
+
+  /** @private */
+  smsConnectToggleStateChanged_: function() {
+    // TODO(orenb): Switch from paper-toggle-button to settings-toggle-button,
+    // which will manage the underlying pref state, once the new pref has been
+    // implemented. Propagate here the pref value to the SMS connect component.
+  },
+});