[Devtools] Fixed bug with _visibleColumns not set

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 646 matching lines @@
         var rootNode = dataGrid.rootNode();
         /** @type {!Array<!WebInspector.NetworkDataGridNode> } */
         var nodesToInsert = [];
         /** @type {!Array<!WebInspector.NetworkDataGridNode> } */
         var nodesToRefresh = [];
         for (var requestId in this._staleRequestIds) {
             var node = this._nodesByRequestId.get(requestId);
             if (!node)
                 continue;
             var isFilteredOut = !this._applyFilter(node);
+            if (isFilteredOut && node === this._hoveredNode)
+                this._hoveredNode = null;
             if (node[WebInspector.NetworkLogView._isFilteredOutSymbol] !== isFilteredOut) {
                 if (!node[WebInspector.NetworkLogView._isFilteredOutSymbol])
                     rootNode.removeChild(node);
 
                 node[WebInspector.NetworkLogView._isFilteredOutSymbol] = isFilteredOut;
 
                 if (!node[WebInspector.NetworkLogView._isFilteredOutSymbol])
                     nodesToInsert.push(node);
             }
             if (!isFilteredOut)
@@ skipping 31 matching lines @@
 
     reset: function()
     {
         this._requestWithHighlightedInitiators = null;
         this.dispatchEventToListeners(WebInspector.NetworkLogView.Events.RequestSelected, null);
 
         this._clearSearchMatchedList();
 
         this._columns.reset();
 
+        this._hoveredNode = null;
+
         this._timeFilter = null;
         this._calculator.reset();
 
         this._timeCalculator.setWindow(null);
 
         var nodes = this._nodesByRequestId.valuesArray();
         for (var i = 0; i < nodes.length; ++i)
             nodes[i].dispose();
 
         this._nodesByRequestId.clear();
@@ skipping 1119 matching lines @@
  * @return {boolean}
  */
 WebInspector.NetworkLogView._requestTimeFilter = function(windowStart, windowEnd, request)
 {
     if (request.issueTime() > windowEnd)
         return false;
     if (request.endTime !== -1 && request.endTime < windowStart)
         return false;
     return true;
 }