CrOS Settings: Add skeleton page for multidevice section.

chrome/test/data/webui/settings/multidevice_page_tests.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.
+
+suite('Multidevice', function() {
+  var multidevicePage = null;
+
+  suiteSetup(function() {
+  });
+
+  setup(function() {
+    PolymerTest.clearBody();
+    multidevicePage = document.createElement('settings-multidevice-page');
+    assertTrue(!!multidevicePage);
+
+    document.body.appendChild(multidevicePage);
+    Polymer.dom.flush();
+  });
+
+  teardown(function() {
+    multidevicePage.remove();
+  });
+
+  test('MainPage', function() {
+    // TODO: Write test once the setting is actually functional.
+  });
+});