Split CSP into pre- and post-upgrade checks

third_party/WebKit/LayoutTests/external/wpt/content-security-policy/frame-src/support/testharness-helper.sub.js

+function generateCrossOriginRedirectFrame() {
+  var target = "http://{{domains[天気の良い日]}}:" + document.location.port + "/content-security-policy/frame-src/support/frame.html";
+  var url = "/common/redirect.py?location=" + encodeURIComponent(target);
+  return { url: url, target: target };
+}