DevTools: local storage view is cloned upon each selection.

third_party/WebKit/Source/devtools/front_end/ui_lazy/DataGrid.js

Index: third_party/WebKit/Source/devtools/front_end/ui_lazy/DataGrid.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui_lazy/DataGrid.js b/third_party/WebKit/Source/devtools/front_end/ui_lazy/DataGrid.js
index 53376a6ba6c09796909bf673d72d3bbaeaf49af5..7cbd38a129672baf09e533f4726ad8a104305e16 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui_lazy/DataGrid.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui_lazy/DataGrid.js
@@ -1865,5 +1865,16 @@ WebInspector.DataGridContainerWidget.prototype = {
         return result;
     },
 
+    /**
+     * @override
+     */
+    detachChildWidgets: function()
+    {
+        WebInspector.Widget.prototype.detachChildWidgets.call(this);
+        for (var dataGrid of this._dataGrids)
+            this.element.removeChild(dataGrid.element);
+        this._dataGrids = [];
+    },
+
     __proto__: WebInspector.VBox.prototype
 }