The other backend description strings are in DisplayImpl. This will help with caching the result of glGetString in the GL backend. Also Update the getters to not be const in order to allow caching. Bug: chromium:1173672 Change-Id: I43df35688762b23429f47f169c04482cf4cd089a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2676881Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
