[ServiceWorker] Introduce the new security restriction of redirected response.

third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/fetch-request-redirect.https.html

Index: third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/fetch-request-redirect.https.html
diff --git a/third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/fetch-request-redirect.https.html b/third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/fetch-request-redirect.https.html
index 4cefad3a74b25982d672137a38bd571a249e2b1d..18bfa61e89f924355ecf3a821a4da49c1226eb03 100644
--- a/third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/fetch-request-redirect.https.html
+++ b/third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/fetch-request-redirect.https.html
@@ -34,10 +34,17 @@ function iframe_test(url, timeout_enabled) {
       frame.onload = function() {
         if (timeout_enabled)
           clearTimeout(timer);
-        if (frame.contentDocument.body.textContent == 'Hello world\n')
-          resolve();
-        else
-          reject(new Error('content mismatch'));
+        try {
+          if (frame.contentDocument.body.textContent == 'Hello world\n')
+            resolve();
+          else
+            reject(new Error('content mismatch'));
+        } catch (e) {
+          // Chrome treats iframes that failed to load due to a network error as
+          // having a different origin, so accessing contentDocument throws an
+          // error. Other browsers might have different behavior.
+          reject(new Error(e));
+        }
         frame.remove();
       };
       document.body.appendChild(frame);