[DevTools] Reset main frame subtree on navigation

third_party/WebKit/Source/devtools/front_end/resources/ResourcesSection.js

 // Copyright 2017 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.
 
 Resources.ResourcesSection = class {
   /**
    * @param {!Resources.ResourcesPanel} storagePanel
    * @param {!UI.TreeElement} treeElement
    */
   constructor(storagePanel, treeElement) {
@@ skipping 57 matching lines @@
 
     this._treeElementForFrameId.remove(frame.id);
     if (frameTreeElement.parent)
       frameTreeElement.parent.removeChild(frameTreeElement);
   }
 
   /**
    * @param {!SDK.ResourceTreeFrame} frame
    */
   _frameNavigated(frame) {
-    if (!Resources.ResourcesSection._getParentFrame(frame))
-      return;
     var frameTreeElement = this._treeElementForFrameId.get(frame.id);
     if (frameTreeElement)
       frameTreeElement.frameNavigated(frame);
   }
 
   /**
    * @param {!SDK.Resource} resource
    */
   _resourceAdded(resource) {
     var statusCode = resource['statusCode'];
@@ skipping 255 matching lines @@
   _sourceView() {
     if (!this._sourceFrame) {
       this._sourceFrame = new SourceFrame.ResourceSourceFrame(this._resource);
       this._sourceFrame.setHighlighterType(this._resource.canonicalMimeType());
     }
     return this._sourceFrame;
   }
 };
 
 Resources.FrameResourceTreeElement._symbol = Symbol('treeElement');