[ServiceWorker] Set FetchRequestMode and handle wasFetchedViaServiceWorker.

LayoutTests/http/tests/serviceworker/fetch-cors-xhr-expected.txt

Index: LayoutTests/http/tests/serviceworker/fetch-cors-xhr-expected.txt
diff --git a/LayoutTests/http/tests/serviceworker/fetch-cors-xhr-expected.txt b/LayoutTests/http/tests/serviceworker/fetch-cors-xhr-expected.txt
index 15775c5727e25c6730e3a1b8c753da963ca41ee8..97fc0b92e9e23cba21e0ba1720832e7564b587b7 100644
--- a/LayoutTests/http/tests/serviceworker/fetch-cors-xhr-expected.txt
+++ b/LayoutTests/http/tests/serviceworker/fetch-cors-xhr-expected.txt
@@ -1,7 +1,10 @@
-CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/serviceworker/resources/fetch-access-control.php. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
-CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/serviceworker/resources/fetch-access-control.php. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
-CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/serviceworker/resources/fetch-access-control.php?ACAOrigin=http://127.0.0.1:8000. Credentials flag is 'true', but the 'Access-Control-Allow-Credentials' header is ''. It must be 'true' to allow credentials.
-
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/serviceworker/resources/fetch-access-control.php?ignore. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/serviceworker/resources/fetch-access-control.php?ignore. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/serviceworker/resources/fetch-access-control.php?ACAOrigin=http://127.0.0.1:8000&ignore. Credentials flag is 'true', but the 'Access-Control-Allow-Credentials' header is ''. It must be 'true' to allow credentials.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/serviceworker/resources/fetch-access-control.php?Auth&ignore. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access. The response had HTTP status code 401.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/serviceworker/resources/fetch-access-control.php?Auth&ignore. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: XMLHttpRequest cannot load http://localhost:8000/serviceworker/resources/fetch-access-control.php?Auth&ACAOrigin=http://127.0.0.1:8000&ignore. Credentials flag is 'true', but the 'Access-Control-Allow-Credentials' header is ''. It must be 'true' to allow credentials.
+ 
 This is a testharness.js-based test.
 PASS Verify CORS XHR of fetch() in a Service Worker 
 Harness: the test ran to completion.