Bug 1436991 [wpt PR 9433] - custom-elements: document.createElementNS should not create HTMLUnknownElement for a valid custom element name, a=testonly

Automatic update from web-platform-tests
Document::CreatRawElement() should check CustomElement::IsValidName().
It failed only if the Document didn't have V0 RegistrationContext.

Bug: 809887
Change-Id: I4e5d283658673db3e1db15b136ca5729d29e2442
Reviewed-on: https://chromium-review.googlesource.com/908128
Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#535299}

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wpt-commits: e05c355958eb0e673db72063c97dcb8f37a4c3d2
wpt-pr: 9433
reapplied-commits: 370e267e160568862f1fd9ec246ab5bb840f586e, fe4514c84e7ad28e46bad5da93381deb99b177f3, 7806af854343c043a2645a4034fdc7812f65daad, 9ddfd21554293dec5a4bf2e5375ae4f3c9f2ded0, 75f63c4d1ebc949647184fd60972fc7b9fd4affb, 1f3a5b496acd2288cc8cf0c32af86cb35157ea4e, 88b42bd5847abac58a62c4d6b33c1509bfce5f3d, 15c2e4c690700c6c115f8afe5e44ded10d943538, c8d461ef1437641ae7d4ea1d21e1e60cd62910b0, a6088a5f48ee299386a84d2f771902267d7355b1, 0634cd8f08ebe0905a9188fb1398c7b5f889c5dc, c8ee4a012dae506ae06bb5b2ad50942b04c1aaaa, c2c352456a4cf62dcc12f851138b04397675a445, b93a8879555d2fa7e7d4e00a275513a3a6338b35, b86e1331cb36634fd33677043b61fc0c1d8485bc, 44ddf14fd3346658c3223f13652073fafbfa48fa, a1a5840a6bb53e305ba02bcbeb215659342d0edb, 7465cb110ae5ec2e2ca73182caf5293f0efc8fd5, aad5349b3458bc3414e274b33fa86a1123901ff2, eca0907980d2769c449894a6277c60c1a306792f, 38626987c0cfd6e715cfcc6f4f1a1209191a03c5, e4a67f7ddcde6cd99348e9104bd7ed07074da44a, bb3c9990840a0fae2afc840b5952d7874785b112, 042d7adef0bdb9dc80e825c3997ace7519477c42, 99f1ea44fc7915b8b7b33bce4732fa8765fd3ac2, b81999f30c1516a70c153de51a0331d14c8faead

testing/web-platform/meta/MANIFEST.json

@@ -537393,7 +537393,7 @@
    "testharness"
   ],
   "custom-elements/Document-createElementNS.html": [
-   "04cd97839e98c6082f67740dbcfc7588e2b251b9",
+   "799f59e3bf8ab0830e44faa3ffef6d3303da42eb",
    "testharness"
   ],
   "custom-elements/HTMLElement-constructor.html": [

testing/web-platform/tests/custom-elements/Document-createElementNS.html

@@ -23,6 +23,14 @@ test(() => {
   assert_false(element instanceof MyElement2);
 }, 'autonomous: document.createElementNS should check namespaces.');
 
+test(() => {
+  const xhtmlNS = 'http://www.w3.org/1999/xhtml';
+  assert_false(document.createElementNS(xhtmlNS, 'x-foo') instanceof HTMLUnknownElement);
+  assert_false(document.createElementNS(xhtmlNS, 'x-foo', {}) instanceof HTMLUnknownElement);
+  assert_false((new Document()).createElementNS(xhtmlNS, 'x-foo') instanceof HTMLUnknownElement);
+  assert_false((new Document()).createElementNS(xhtmlNS, 'x-foo', {}) instanceof HTMLUnknownElement);
+}, 'autonomous: document.createElementNS should not create HTMLUnknownElement for a valid custom element name');
+
 test(() => {
   class MyBuiltinElement extends HTMLElement {};