Use the FormatCaps for multisample validation and queries.

BUG=angle:658

Change-Id: Ic9fa53fb62d7eff62f07b68d7ddada461ecad859
Reviewed-on: https://chromium-review.googlesource.com/206832
Tested-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
17 files changed