DevTools: implement release note behind an experiment

third_party/WebKit/Source/devtools/front_end/externs.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 843 matching lines @@
 var Extensions = {};
 /** @type {!Object} */
 var EventListeners = {};
 /** @type {!Object} */
 var FormatterWorker = {};
 /** @type {!Object} */
 var HeapSnapshotModel = {};
 /** @type {!Object} */
 var HeapSnapshotWorker = {};
 /** @type {!Object} */
+var Help = {};
+/** @type {!Object} */
 var Host = {};
 /** @type {!Object} */
 var InlineEditor = {};
 /** @type {!Object} */
 var LayerViewer = {};
 /** @type {!Object} */
 var Layers = {};
 /** @type {!Object} */
 var Main = {};
 /** @type {!Object} */
@@ skipping 45 matching lines @@
 /** @type {!Object} */
 var ToolboxBootstrap = {};
 /** @type {!Object} */
 var UI = {};
 /** @type {!Object} */
 var UtilitySharedWorker = {};
 /** @type {!Object} */
 var WorkerService = {};
 /** @type {!Object} */
 var Workspace = {};