Clean up some old tests that use I noticed these during a review of [1]. Several are accidental mis- nesting of tags, and others are tests that are (very) obsolete. This also refactors the select-parsing.tentative.html test to be a bit easier to read/write, and adds a <textarea> test case there. [1] https://chromium-review.googlesource.com/c/chromium/src/+/5974380 Change-Id: If4ee560b20c46ce290c6acf515d11bb47a13559e Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5979630 Auto-Submit: Mason Freed masonf@chromium.org Commit-Queue: Joey Arhar jarhar@chromium.org Reviewed-by: Joey Arhar jarhar@chromium.org Cr-Commit-Position: refs/heads/main@{#1377739}