Bug 1815862 [wpt PR 38431] - WebKit export of https://bugs.webkit.org…

…/show_bug.cgi?id=251936, a=testonly

Automatic update from web-platform-tests
WebKit export of https://bugs.webkit.org/show_bug.cgi?id=251936 (#38431)

This adds a test that Headers objects with the "request-no-cors" guard
don't accept empty header values for non-safelisted header names.
--

wpt-commits: 0598a719081c98f88e6a044718dec2cb0f7c2682
wpt-pr: 38431

testing/web-platform/tests/fetch/api/request/request-headers.any.js

@@ -59,6 +59,7 @@ var invalidRequestNoCorsHeaders = [
   ["proxya", "KO"],
   ["sec", "KO"],
   ["secb", "KO"],
+  ["Empty-Value", ""],
 ];
 
 validRequestHeaders.forEach(function(header) {