[DevTools] Typed events and event listeners.

third_party/WebKit/Source/devtools/front_end/ui/TabbedPane.js

Index: third_party/WebKit/Source/devtools/front_end/ui/TabbedPane.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/TabbedPane.js b/third_party/WebKit/Source/devtools/front_end/ui/TabbedPane.js
index 3616263ac050f151e60f7213914d8f8037298465..5a5ff0010d1f9300303ec69cb909548eedc95392 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/TabbedPane.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/TabbedPane.js
@@ -531,16 +531,16 @@ UI.TabbedPane = class extends UI.VBox {
     var dropDownContainer = createElementWithClass('div', 'tabbed-pane-header-tabs-drop-down-container');
     dropDownContainer.createChild('div', 'glyph');
     this._dropDownMenu = new UI.DropDownMenu(dropDownContainer);
-    this._dropDownMenu.addEventListener(UI.DropDownMenu.Events.ItemSelected, this._dropDownMenuItemSelected, this);
+    this._dropDownMenu.addEventListener(UI.DropDownMenu.ItemSelectedEvent, this._dropDownMenuItemSelected, this);
 
     return dropDownContainer;
   }
 
   /**
-   * @param {!Common.Event} event
+   * @param {!UI.DropDownMenu.ItemSelectedEvent} event
    */
   _dropDownMenuItemSelected(event) {
-    var tabId = /** @type {string} */ (event.data);
+    var tabId = event.id;
     this._lastSelectedOverflowTab = this._tabsById[tabId];
     this.selectTab(tabId, true);
   }