Add note page to options.

chrome/browser/resources/options/chromeos/note_overlay.js

+// Copyright (c) 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.
+
+cr.define('options', function() {
+  /**
+   * Encapsulated handling of the note overlay.
+   * @constructor
+   * @extends {options.SettingsDialog}
+   */
+  function NoteOverlay() {
+    options.SettingsDialog.call(this, 'note-overlay',
+         loadTimeData.getString('noteOverlayTabTitle'),
+        'note-overlay',
+        assertInstanceof($('note-confirm'), HTMLButtonElement),
+        assertInstanceof($('note-cancel'), HTMLButtonElement));
+  }
+
+  cr.addSingletonGetter(NoteOverlay);
+
+  NoteOverlay.prototype = {
+    __proto__: options.SettingsDialog.prototype,
+
+    /** @override */
+    initializePage: function() {
+      options.SettingsDialog.prototype.initializePage.call(this);
+    },
+  };
+
+  // Export
+  return {
+    NoteOverlay: NoteOverlay
+  };
+});