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

third_party/WebKit/Source/devtools/front_end/resources/AppManifestView.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.
 /**
  * @implements {SDK.TargetManager.Observer}
  * @unrestricted
  */
 Resources.AppManifestView = class extends UI.VBox {
   constructor() {
     super(true);
     this.registerRequiredCSS('resources/appManifestView.css');
 
     this._reportView = new UI.ReportView(Common.UIString('App Manifest'));
     this._reportView.show(this.contentElement);
 
     this._errorsSection = this._reportView.appendSection(Common.UIString('Errors and warnings'));
     this._identitySection = this._reportView.appendSection(Common.UIString('Identity'));
     var toolbar = this._identitySection.createToolbar();
     toolbar.renderAsLinks();
     var addToHomeScreen =
         new UI.ToolbarButton(Common.UIString('Add to homescreen'), undefined, Common.UIString('Add to homescreen'));
-    addToHomeScreen.addEventListener(UI.ToolbarButton.Events.Click, this._addToHomescreen, this);
+    addToHomeScreen.addEventListener('click', this._addToHomescreen.bind(this));
     toolbar.appendToolbarItem(addToHomeScreen);
 
     this._presentationSection = this._reportView.appendSection(Common.UIString('Presentation'));
     this._iconsSection = this._reportView.appendSection(Common.UIString('Icons'));
 
     this._nameField = this._identitySection.appendField(Common.UIString('Name'));
     this._shortNameField = this._identitySection.appendField(Common.UIString('Short name'));
 
     this._startURLField = this._presentationSection.appendField(Common.UIString('Start URL'));
 
@@ skipping 96 matching lines @@
      * @return {string}
      */
     function stringProperty(name) {
       var value = parsedManifest[name];
       if (typeof value !== 'string')
         return '';
       return value;
     }
   }
 
-  /**
-   * @param {!Common.Event} event
-   */
-  _addToHomescreen(event) {
+  _addToHomescreen() {
     var target = SDK.targetManager.mainTarget();
     if (target && target.hasBrowserCapability()) {
       target.pageAgent().requestAppBanner();
       Common.console.show();
     }
   }
 };