void SitePerProcessBrowserTest::SetUpOnMainThread() {
  host_resolver()->AddRule("*", "127.0.0.1");
  SetupCrossSiteRedirector(embedded_test_server());
  ASSERT_TRUE(embedded_test_server()->Start());
}

The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.