DevTools: introduce View: a named widget with the toolbar.

third_party/WebKit/Source/devtools/front_end/network/RequestPreviewView.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 50 matching lines @@
                 this.innerView = this._previewView;
         }
 
         /**
          * @param {!WebInspector.Widget} view
          * @this {WebInspector.RequestPreviewView}
          */
         function handlePreviewView(view) {
             this._previewView = view;
             this._previewView.show(this.element);
-            if (this._previewView instanceof WebInspector.VBoxWithToolbarItems) {
+            if (this._previewView instanceof WebInspector.View) {
                 var toolbar = new WebInspector.Toolbar("network-item-preview-toolbar", this.element);
-                for (var item of /** @type {!WebInspector.VBoxWithToolbarItems} */ (this._previewView).toolbarItems())
+                for (var item of /** @type {!WebInspector.View} */ (this._previewView).toolbarItems())
                     toolbar.appendToolbarItem(item);
             }
             this.innerView = this._previewView;
             this._previewViewHandledForTest(this._previewView);
         }
     },
 
     /**
      * @param {!WebInspector.Widget} view
      */
@@ skipping 103 matching lines @@
 
             if (this.request.resourceType() === WebInspector.resourceTypes.Other)
                 return this._createEmptyWidget();
 
             return WebInspector.RequestView.nonSourceViewForRequest(this.request);
         }
     },
 
     __proto__: WebInspector.RequestContentView.prototype
 }