DevTools: Fix previous cookie selection

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

Index: third_party/WebKit/Source/devtools/front_end/cookie_table/CookiesTable.js
diff --git a/third_party/WebKit/Source/devtools/front_end/cookie_table/CookiesTable.js b/third_party/WebKit/Source/devtools/front_end/cookie_table/CookiesTable.js
index 5076c466d9a33def4af8e24e4d10536769232541..3c11c51e8176024f7a5a50542c69544a71bdec2d 100644
--- a/third_party/WebKit/Source/devtools/front_end/cookie_table/CookiesTable.js
+++ b/third_party/WebKit/Source/devtools/front_end/cookie_table/CookiesTable.js
@@ -135,9 +135,13 @@ CookieTable.CookiesTable = class extends UI.VBox {
    */
   _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)
+    };
   }
 
   /**