DevTools: Fix previous cookie selection

third_party/WebKit/Source/devtools/front_end/cookie_table/CookiesTable.js

 /*
  * Copyright (C) 2009 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  * Copyright (C) 2010 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 117 matching lines @@
   selectedCookie() {
     var node = this._dataGrid.selectedNode;
     return node ? node.cookie : null;
   }
 
   /**
    * @return {{current: ?SDK.Cookie, neighbor: ?SDK.Cookie}}
    */
   _getSelectionCookies() {
     var node = this._dataGrid.selectedNode;
-    var neighbor = node && (node.traverseNextNode(true) || node.traversePreviousNode(true));
+    var nextNeighbor = node && node.traverseNextNode(true);
+    var previousNeighbor = node && node.traversePreviousNode(true);
 
-    return {current: node && node.cookie, neighbor: neighbor && neighbor.cookie};
+    return {
+      current: node && node.cookie,
+      neighbor: (nextNeighbor && nextNeighbor.cookie) || (previousNeighbor && previousNeighbor.cookie)
+    };
   }
 
   /**
    * @override
    */
   willHide() {
     this._lastEditedColumnId = null;
   }
 
   /**
@@ skipping 313 matching lines @@
   }
 
   _refresh() {
     if (this._refreshCallback)
       this._refreshCallback();
   }
 };
 
 /** @const */
 CookieTable.CookiesTable._expiresSessionValue = Common.UIString('Session');