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

third_party/WebKit/Source/devtools/front_end/timeline/TimelinePanel.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 264 matching lines @@
   _recreateToolbarItems() {
     this._panelToolbar.removeToolbarItems();
 
     var perspectiveSetting =
         Common.settings.createSetting('timelinePerspective', Timeline.TimelinePanel.Perspectives.Load);
 
     // Record
     if (Runtime.experiments.isEnabled('timelineRecordingPerspectives') &&
         perspectiveSetting.get() === Timeline.TimelinePanel.Perspectives.Load) {
       this._reloadButton = new UI.ToolbarButton(Common.UIString('Record & Reload'), 'largeicon-refresh');
-      this._reloadButton.addEventListener(UI.ToolbarButton.Events.Click, () => SDK.targetManager.reloadPage());
+      this._reloadButton.addEventListener('click', () => SDK.targetManager.reloadPage());
       this._panelToolbar.appendToolbarItem(this._reloadButton);
     } else {
       this._panelToolbar.appendToolbarItem(UI.Toolbar.createActionButton(this._toggleRecordAction));
     }
 
     // Clear
     var clearButton = new UI.ToolbarButton(Common.UIString('Clear recording'), 'largeicon-clear');
-    clearButton.addEventListener(UI.ToolbarButton.Events.Click, this._clear, this);
+    clearButton.addEventListener('click', this._clear, this);
     this._panelToolbar.appendToolbarItem(clearButton);
 
     this._panelToolbar.appendSeparator();
 
     // Combo
     if (Runtime.experiments.isEnabled('timelineRecordingPerspectives')) {
       /**
        * @this {!Timeline.TimelinePanel}
        */
       function onPerspectiveChanged() {
@@ skipping 1640 matching lines @@
   }
 
   /**
    * @override
    * @param {!SDK.Target} target
    */
   targetRemoved(target) {
     this._targets.remove(target, true);
   }
 };