function commitHandler(element, newTitle, oldTitle)
        {
            if (newTitle !== oldTitle) {
                this._treeElement.titleText = newTitle;
                this._uiSourceCode.rename(newTitle, renameCallback.bind(this));
                return;
            }
            afterEditing.call(this, true);
        }
@param {!Element} element
@param {string} newTitle
@param {string} oldTitle
@this {WebInspector.NavigatorUISourceCodeTreeNode}