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

third_party/WebKit/Source/devtools/front_end/components/ObjectPopoverHelper.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 80 matching lines @@
       var container = createElementWithClass('div', 'object-popover-container');
       var title = container.createChild('div', 'function-popover-title source-code');
       var functionName = title.createChild('span', 'function-name');
       functionName.textContent = UI.beautifyFunctionName(response.functionName);
 
       var rawLocation = response.location;
       var linkContainer = title.createChild('div', 'function-title-link-container');
       if (rawLocation && Runtime.experiments.isEnabled('continueToFirstInvocation')) {
         var sectionToolbar = new UI.Toolbar('function-location-step-into', linkContainer);
         var stepInto = new UI.ToolbarButton(Common.UIString('Continue to first invocation'), 'largeicon-step-in');
-        stepInto.addEventListener(UI.ToolbarButton.Events.Click, () => rawLocation.continueToLocation());
+        stepInto.addEventListener('click', () => rawLocation.continueToLocation());
         sectionToolbar.appendToolbarItem(stepInto);
       }
       var sourceURL = rawLocation && rawLocation.script() ? rawLocation.script().sourceURL : null;
       if (rawLocation && sourceURL)
         linkContainer.appendChild(this._lazyLinkifier().linkifyRawLocation(rawLocation, sourceURL));
       container.appendChild(popoverContentElement);
       popover.showForAnchor(container, anchorElement);
     }
 
     /**
@@ skipping 78 matching lines @@
    * @return {!Components.Linkifier}
    */
   _lazyLinkifier() {
     if (!this._linkifier)
       this._linkifier = new Components.Linkifier();
     return this._linkifier;
   }
 };
 
 Components.ObjectPopoverHelper.MaxPopoverTextLength = 10000;