void DevToolsToolboxDelegate::HandleKeyboardEvent(
    content::WebContents* source,
    const content::NativeWebKeyboardEvent& event) {
  if (event.windows_key_code == 0x08) {
    return;
  }
  BrowserWindow* window = GetInspectedBrowserWindow();
  if (window)
    window->HandleKeyboardEvent(event);
}

The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.