[DevTools] Typed events and event listeners.

third_party/WebKit/Source/devtools/front_end/persistence/PersistenceUtils.js

 // Copyright 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.
 
 Persistence.PersistenceUtils = class {
   /**
    * @param {!Workspace.UISourceCode} uiSourceCode
    * @return {string}
    */
   static tooltipForUISourceCode(uiSourceCode) {
@@ skipping 11 matching lines @@
 /**
  * @extends {Common.Object}
  * @implements {Components.LinkDecorator}
  */
 Persistence.PersistenceUtils.LinkDecorator = class extends Common.Object {
   /**
    * @param {!Persistence.Persistence} persistence
    */
   constructor(persistence) {
     super();
-    persistence.addEventListener(Persistence.Persistence.Events.BindingCreated, this._bindingChanged, this);
-    persistence.addEventListener(Persistence.Persistence.Events.BindingRemoved, this._bindingChanged, this);
+    persistence.addEventListener(Persistence.Persistence.BindingChangedEvent, this._bindingChanged, this);
   }
 
   /**
-   * @param {!Common.Event} event
+   * @param {!Persistence.Persistence.BindingChangedEvent} event
    */
   _bindingChanged(event) {
-    var binding = /** @type {!Persistence.PersistenceBinding} */ (event.data);
-    this.dispatchEventToListeners(Components.LinkDecorator.Events.LinkIconChanged, binding.network);
+    this.dispatchEventToListeners(Components.LinkDecorator.Events.LinkIconChanged, event.binding.network);
   }
 
   /**
    * @override
    * @param {!Workspace.UISourceCode} uiSourceCode
    * @return {?UI.Icon}
    */
   linkIcon(uiSourceCode) {
     var binding = Persistence.persistence.binding(uiSourceCode);
     if (!binding)
       return null;
     var icon = UI.Icon.create('smallicon-green-checkmark');
     icon.title = Persistence.PersistenceUtils.tooltipForUISourceCode(uiSourceCode);
     return icon;
   }
 };