[DevTools] Migrate usages of Target to RuntimeModel where makes sense

third_party/WebKit/Source/devtools/front_end/sources/ObjectEventListenersSidebarPane.js

 // Copyright 2015 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 {UI.ToolbarItem.ItemsProvider}
  * @unrestricted
  */
 Sources.ObjectEventListenersSidebarPane = class extends UI.VBox {
   constructor() {
     super();
     this.element.classList.add('event-listeners-sidebar-pane');
 
     this._refreshButton = new UI.ToolbarButton(Common.UIString('Refresh'), 'largeicon-refresh');
     this._refreshButton.addEventListener(UI.ToolbarButton.Events.Click, this._refreshClick, this);
     this._refreshButton.setEnabled(false);
 
     this._eventListenersView = new EventListeners.EventListenersView(this.element, this.update.bind(this));
   }
 
   /**
    * @override
    * @return {!Array<!UI.ToolbarItem>}
    */
   toolbarItems() {
     return [this._refreshButton];
   }
 
   update() {
     if (this._lastRequestedContext) {
-      this._lastRequestedContext.target().runtimeModel.releaseObjectGroup(
+      this._lastRequestedContext.runtimeModel.releaseObjectGroup(
           Sources.ObjectEventListenersSidebarPane._objectGroupName);
       delete this._lastRequestedContext;
     }
     var executionContext = UI.context.flavor(SDK.ExecutionContext);
     if (!executionContext) {
       this._eventListenersView.reset();
       this._eventListenersView.addEmptyHolderIfNeeded();
       return;
     }
     this._lastRequestedContext = executionContext;
@@ skipping 49 matching lines @@
   /**
    * @param {!Common.Event} event
    */
   _refreshClick(event) {
     event.data.consume();
     this.update();
   }
 };
 
 Sources.ObjectEventListenersSidebarPane._objectGroupName = 'object-event-listeners-sidebar-pane';