[Devtools] Fixes network group to remove parents if no child

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

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008, 2009 Anthony Ricaud <rik@webkit.org>
  * 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 782 matching lines @@
       var isFilteredOut = !this._applyFilter(node);
       if (isFilteredOut && node === this._hoveredNode)
         this._setHoveredNode(null);
 
       if (!isFilteredOut)
         nodesToRefresh.push(node);
       var request = node.request();
       this._timeCalculator.updateBoundaries(request);
       this._durationCalculator.updateBoundaries(request);
 
-      if (node[Network.NetworkLogView._isFilteredOutSymbol] === isFilteredOut)

[pfeldman, 2017/02/16 01:55:14]

offtopic: why do we actually need this symbol at all?

-        continue;
-
       node[Network.NetworkLogView._isFilteredOutSymbol] = isFilteredOut;
       var newParent = this._parentNodeForInsert(node);
       var removeFromParent = node.parent && (isFilteredOut || node.parent !== newParent);
       if (removeFromParent) {
         var parent = node.parent;
         parent.removeChild(node);
         while (parent && !parent.hasChildren() && parent.dataGrid && parent.dataGrid.rootNode() !== parent) {
           var grandparent = parent.parent;
           grandparent.removeChild(parent);
           parent = grandparent;
         }
       }
 
-      if (isFilteredOut)
+      if (!newParent || isFilteredOut)
         continue;
 
       if (!newParent.dataGrid && !nodesToInsert.has(newParent)) {
         nodesToInsert.set(newParent, this._dataGrid.rootNode());
         nodesToRefresh.push(newParent);
       }
       nodesToInsert.set(node, newParent);
     }
 
     for (var node of nodesToInsert.keys()) {
@@ skipping 945 matching lines @@
   Running: 'running',
   FromCache: 'from-cache'
 };
 
 /** @type {!Array<string>} */
 Network.NetworkLogView._searchKeys =
     Object.keys(Network.NetworkLogView.FilterType).map(key => Network.NetworkLogView.FilterType[key]);
 
 /** @typedef {function(!SDK.NetworkRequest): boolean} */
 Network.NetworkLogView.Filter;