[A11y] Handle illegal aria-owns from <br>

Fixed: 1510241
Change-Id: I1ce3571c56fcfd6cc6d57458ff644162588d233a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5259102
Reviewed-by: Mark Schillaci <mschillaci@google.com>
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1255303}
diff --git a/accessibility/crashtests/illegal-aria-owns-from-br.html b/accessibility/crashtests/illegal-aria-owns-from-br.html
new file mode 100644
index 0000000..cb042b6
--- /dev/null
+++ b/accessibility/crashtests/illegal-aria-owns-from-br.html
@@ -0,0 +1,3 @@
+<!DOCTYPE html>
+<div id="id1">abc</div>
+<br aria-owns="id1"></br>