Optimize WebGL clear type validation Use cached component type masks instead of iterating over all attachments every time. Fixed: angleproject:8618 Change-Id: I45b83639120c0b4f50027d1d85fe9158f5cf187d Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5407657 Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org>