Revert of [DevTools] Remove methods on Common.Event.

third_party/WebKit/Source/devtools/front_end/screencast/ScreencastApp.js

 // Copyright 2014 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.
 /**
  * @implements {Common.App}
  * @implements {SDK.TargetManager.Observer}
  * @unrestricted
  */
 Screencast.ScreencastApp = class {
   constructor() {
     this._enabledSetting = Common.settings.createSetting('screencastEnabled', true);
     this._toggleButton = new UI.ToolbarToggle(Common.UIString('Toggle screencast'), 'largeicon-phone');
     this._toggleButton.setToggled(this._enabledSetting.get());
-    this._toggleButton.addEventListener(UI.ToolbarButton.Events.Click, this._toggleButtonClicked, this);
+    this._toggleButton.addEventListener('click', this._toggleButtonClicked, this);
     SDK.targetManager.observeTargets(this);
   }
 
   /**
    * @return {!Screencast.ScreencastApp}
    */
   static _instance() {
     if (!Screencast.ScreencastApp._appInstance)
       Screencast.ScreencastApp._appInstance = new Screencast.ScreencastApp();
     return Screencast.ScreencastApp._appInstance;
@@ skipping 94 matching lines @@
  */
 Screencast.ScreencastAppProvider = class {
   /**
    * @override
    * @return {!Common.App}
    */
   createApp() {
     return Screencast.ScreencastApp._instance();
   }
 };