Reland "Limit ANGLE PBO workaround to blocking use of GL_UNPACK_ROW_LENGTH"

This is a reland of 7788b3a62f97995ea680f7fe99b8634ff716ae5a

Original change's description:
> Limit ANGLE PBO workaround to blocking use of GL_UNPACK_ROW_LENGTH
>
> Previously we blocked all PBO->texture transfers.
>
> Bug: angleproject:5542
>
> Change-Id: I1decfbc9293c03da125716c73e6d635e2ab9cb1d
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/406997
> Commit-Queue: Brian Salomon <bsalomon@google.com>
> Reviewed-by: Robert Phillips <robertphillips@google.com>

Bug: angleproject:5542
Change-Id: Id2474a47bdab368d36ddfbed335a8c58d5567fad
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/416477
Commit-Queue: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Auto-Submit: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
9 files changed