Implement animation behavior of the interpolate-size CSS property.
This implements the animation behavior of the interpolate-size CSS
property to enable CSS animations between sizing keywords when possible,
and removes a feature flag (and corresponding virtual test suite) that
enabled the same.
For more on the interpolate-size property, see:
https://chromestatus.com/feature/5196713071738880
https://drafts.csswg.org/css-values-5/#interpolate-size
w3c/csswg-drafts#10294
Bug: 313072
Fixed: 349903574, 346977015
Change-Id: Ie4214af5ff5ea1e3253893dbcc5567e9026f1a06
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5671547
Commit-Queue: David Baron dbaron@chromium.org
Reviewed-by: Robert Flack flackr@chromium.org
Cr-Commit-Position: refs/heads/main@{#1329119}