void DevToolsWindow::OnPageCloseCanceled(content::WebContents* contents) {
  DevToolsWindow *window =
      DevToolsWindow::GetInstanceForInspectedRenderViewHost(
          contents->GetRenderViewHost());
  if (!window)
    return;
  window->intercepted_page_beforeunload_ = false;
  DevToolsWindow::OnPageCloseCanceled(window->web_contents());
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.