Spec: https://www.khronos.org/registry/webgl/extensions/EXT_texture_compression_bptc/ The extension is fully implemented in all ANGLE renderers.
<rdar://problem/88373038>
Pull request: https://github.com/WebKit/WebKit/pull/1061
Committed r294972 (251076@main): <https://commits.webkit.org/251076@main> Reviewed commits have been landed. Closing PR #1061 and removing active labels.