Fix typo in CSSAttrType::ConvertToCSSSyntaxDefinition
attr() type "ident" should be parsed as "custom-ident" in CSS syntax
parser. Added tests for "ident" type to wpt test.
Bug: 40320391
Change-Id: Id239352abba95029857c2f661b21294d1858cd28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5725654
Commit-Queue: Munira Tursunova moonira@google.com
Reviewed-by: Anders Hartvoll Ruud andruud@chromium.org
Cr-Commit-Position: refs/heads/main@{#1336733}