Bug 1605296 [wpt PR 20880] - Use HTTP_NOTSAMESITE_ORIGIN for split cache Web Platform Test, a=testonly

Automatic update from web-platform-tests
Use HTTP_NOTSAMESITE_ORIGIN for split cache Web Platform Test

Currently HTTP_REMOTE_ORIGIN is used as the third-party origin, but
this does not work for split cache experiments using eTLD+1 as the
additional key (i.e. when UseRegistrableDomainInNetworkIsolationKey is
enabled). This is due to HTTP_REMOTE_ORIGIN simply prepending 'ww1.' to
the HTTP_ORIGIN, which results in the same registrable domain.

Bug: 1035508
Change-Id: Ib42bb30491bb451a47b80914a48e252a9c93d10f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1978037
Reviewed-by: Shivani Sharma <shivanisha@chromium.org>
Commit-Queue: Alex Turner <alexmt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727110}

--

wpt-commits: 44e3f8a64aacebd5123aac7456cb81f423c38860
wpt-pr: 20880

testing/web-platform/tests/fetch/http-cache/split-cache.tentative.html

@@ -16,7 +16,7 @@ const host = get_host_info();
 
 // We run this entire test twice: first with a same-origin then with a cross-origin popup
 function performFullTest(is_same_origin_test) {
-  const POPUP_HTTP_ORIGIN = is_same_origin_test ? host.HTTP_ORIGIN : host.HTTP_REMOTE_ORIGIN
+  const POPUP_HTTP_ORIGIN = is_same_origin_test ? host.HTTP_ORIGIN : host.HTTP_NOTSAMESITE_ORIGIN
   const LOCAL_HTTP_ORIGIN = host.HTTP_ORIGIN
 
   const popupBaseURL = POPUP_HTTP_ORIGIN + window.location.pathname.replace(/\/[^\/]*$/, '/') ;