Remove references to the obsolete style property `clip: rect(1px, 1px, 1px, 1px);` and replace or adapt to use `clip-path: inset(50%);`. Update associated `:focus` styles as appropriate. Remove prefixed instances of `-webkit-clip-path`.
Props afercia, hbhalodia, audrasjb, joedolson, sabernhardt.
Fixes#62238.
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