Set service worker response info data for foreign fetch intercepted fetches.

third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/foreign-fetch-worker.js

Index: third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/foreign-fetch-worker.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/foreign-fetch-worker.js b/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/foreign-fetch-worker.js
index 765972c71856bafce9298feab5441fe47e62f5af..0ea6e4adc3f96c70399da24e12f1834f8a5aa6b2 100644
--- a/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/foreign-fetch-worker.js
+++ b/third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/foreign-fetch-worker.js
@@ -13,21 +13,24 @@ self.addEventListener('install', function(event) {
   });
 
 function handle_basic(event) {
-  event.respondWith({response:
-    new Response('Foreign Fetch',
-                  {headers: {'Access-Control-Allow-Origin': '*'}})});
+  event.respondWith({response: new Response('Foreign Fetch')});
 }
 
 function handle_onmessage(event) {
   event.respondWith({response:
     new Response('<script>window.onmessage = e => e.ports[0].postMessage("failed");</script>',
-                {headers: {'Content-Type': 'text/html', 'Access-Control-Allow-Origin': '*'}})});
+                 {headers: {'Content-Type': 'text/html'}})});
+}
+
+function handle_fallback(event) {
+  // Do nothing.
 }
 
 self.addEventListener('foreignfetch', function(event) {
     var url = event.request.url;
     var handlers = [
       { pattern: '?basic', fn: handle_basic },
+      { pattern: '?fallback', fn: handle_fallback },
       { pattern: '?onmessage', fn: handle_onmessage }
     ];