[Devtools] Fixed bug with _visibleColumns not set

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

Index: third_party/WebKit/Source/devtools/front_end/network/NetworkLogView.js
diff --git a/third_party/WebKit/Source/devtools/front_end/network/NetworkLogView.js b/third_party/WebKit/Source/devtools/front_end/network/NetworkLogView.js
index bf7a209cc09c5da8088e34f5977df07767774868..dd36b68cf14f4723147c7b634744bc9c69077c41 100644
--- a/third_party/WebKit/Source/devtools/front_end/network/NetworkLogView.js
+++ b/third_party/WebKit/Source/devtools/front_end/network/NetworkLogView.js
@@ -664,6 +664,8 @@ WebInspector.NetworkLogView.prototype = {
             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);
@@ -715,6 +717,8 @@ WebInspector.NetworkLogView.prototype = {
 
         this._columns.reset();
 
+        this._hoveredNode = null;
+
         this._timeFilter = null;
         this._calculator.reset();