Bug 1768516 [wpt PR 34000] - Fix dialog focusing steps for disconnected dialog, a=testonly

Automatic update from web-platform-tests
Fix dialog focusing steps for disconnected dialog

When the dialog is disconnected, it should not change the focus.

Fixed: 1322448
Change-Id: Icb68842686596d20918d943a2b9ff7e044794c3c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3631175
Reviewed-by: Joey Arhar <jarhar@chromium.org>
Auto-Submit: Mason Freed <masonf@chromium.org>
Commit-Queue: Joey Arhar <jarhar@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1001156}

--

wpt-commits: a3039eb3512b601a21e856c5d1b907897095e108
wpt-pr: 34000

testing/web-platform/tests/html/semantics/interactive-elements/the-dialog-element/dialog-focusing-steps-disconnected.html

@@ -16,6 +16,7 @@ test(function() {
 
   const dialog = document.createElement("dialog");
   assert_false(dialog.open, "Dialog should initially be closed");
+  assert_false(dialog.hasAttribute('open'), "Dialog should initially be closed");
 
   const innerInput = document.createElement("input");
   innerInput.autofocus = true;
@@ -23,6 +24,8 @@ test(function() {
 
   dialog.show();
   this.add_cleanup(() => { dialog.close(); });
+  assert_true(dialog.open, "Disconnected dialog can still be open");
+
 
   assert_equals(document.activeElement, outerInput, "Focusing steps should not change focus");
 }, "dialog.show(): focusing steps should not change focus on disconnected <dialog>");