HTMLStyleElement should create its style sheet even if its media attribute is invalid.
WebKit currently doesn't and this is causing us to fail the following WPT test:
This test is passing in both Firefox and Chrome.
Created attachment 435307 [details]
Corresponding Blink change: https://chromium-review.googlesource.com/631859
Committed r280910 (240432@main): <https://commits.webkit.org/240432@main>
All reviewed patches have been landed. Closing bug and clearing flags on attachment 435307 [details].