ProgramSettings now has a fRequiredVersion, based on the #version
directive (if any). There is plenty more to do, and this is an
intermediate state where the "fEnforceES2Restrictions" bool still
exists. Eventually, that will go away, or change into a check between
the required version and the SkCapabilities supplied (also in
ProgramSettings).
As a proof-of-concept, this migrates some use-cases to insert the new
version directive, and unlock ES3 features in some tests and benches.
Bug: skia:11209
Change-Id: I964975931039588d7a302bfedd09246e3d4a79d2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/540037
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
