Automatic update from web-platform-tests [forms] Make <select> use a UA-clip instead of a manual one. This aligns with Firefox to implement the clip behaviour of the select element in the UA-stylesheet. See: https://searchfox.org/firefox-main/rev/f19dd05bb08e26d46137ce52924e35ff7a501dfe/layout/style/res/forms.css#211 This is currently unspecified, and there is an open issue on the HTML spec here: https://github.com/whatwg/html/issues/10031 Behind the flag: SelectUsesUAClip Additionally we need to specify overflow-clip-margin:content-box to maintain our previous behaviour which differs slightly from Firefox. Change-Id: Icdc61604603f5b15735958b1b95e408fb74e7b1b Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7916526 Reviewed-by: David Baron <dbaron@chromium.org> Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org> Cr-Commit-Position: refs/heads/main@{#1644964} -- wpt-commits: b65827009f87c89d569fa442ec403d34a2b54f88 wpt-pr: 60536