Remove erroneous TT check from Element.toggleAttribute.
This implements Element::toggleAttribute in terms of
SetAttributeInternal, rather than the other methods
that do additional steps (like the TT check that caused
the referenced bug).
Bug: 341057803
Change-Id: I016f4fb0eb0e56c62e61fe1a7e0d8fc25d6d8493
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5557923
Commit-Queue: Daniel Vogelheim vogelheim@chromium.org
Reviewed-by: Mason Freed masonf@chromium.org
Cr-Commit-Position: refs/heads/main@{#1313927}