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

third_party/WebKit/Source/devtools/front_end/layer_viewer/TransformController.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.
  */
 
 /**
  * @unrestricted
  */
 LayerViewer.TransformController = class extends Common.Object {
@@ skipping 15 matching lines @@
     element.addEventListener('mousewheel', this._onMouseWheel.bind(this), false);
     this._minScale = 0;
     this._maxScale = Infinity;
 
     this._controlPanelToolbar = new UI.Toolbar('transform-control-panel');
 
     /** @type {!Object<string, !UI.ToolbarToggle>} */
     this._modeButtons = {};
     if (!disableRotate) {
       var panModeButton = new UI.ToolbarToggle(Common.UIString('Pan mode (X)'), 'largeicon-pan');
-      panModeButton.addEventListener(
-          UI.ToolbarButton.Events.Click, this._setMode.bind(this, LayerViewer.TransformController.Modes.Pan));
+      panModeButton.addEventListener('click', this._setMode.bind(this, LayerViewer.TransformController.Modes.Pan));
       this._modeButtons[LayerViewer.TransformController.Modes.Pan] = panModeButton;
       this._controlPanelToolbar.appendToolbarItem(panModeButton);
       var rotateModeButton = new UI.ToolbarToggle(Common.UIString('Rotate mode (V)'), 'largeicon-rotate');
       rotateModeButton.addEventListener(
-          UI.ToolbarButton.Events.Click, this._setMode.bind(this, LayerViewer.TransformController.Modes.Rotate));
+          'click', this._setMode.bind(this, LayerViewer.TransformController.Modes.Rotate));
       this._modeButtons[LayerViewer.TransformController.Modes.Rotate] = rotateModeButton;
       this._controlPanelToolbar.appendToolbarItem(rotateModeButton);
     }
     this._setMode(LayerViewer.TransformController.Modes.Pan);
 
     var resetButton = new UI.ToolbarButton(Common.UIString('Reset transform (0)'), 'largeicon-center');
-    resetButton.addEventListener(UI.ToolbarButton.Events.Click, this.resetAndNotify.bind(this, undefined));
+    resetButton.addEventListener('click', this.resetAndNotify.bind(this, undefined));
     this._controlPanelToolbar.appendToolbarItem(resetButton);
 
     this._reset();
   }
 
   /**
    * @return {!UI.Toolbar}
    */
   toolbar() {
     return this._controlPanelToolbar;
@@ skipping 255 matching lines @@
   TransformChanged: Symbol('TransformChanged')
 };
 
 /**
  * @enum {string}
  */
 LayerViewer.TransformController.Modes = {
   Pan: 'Pan',
   Rotate: 'Rotate',
 };