Store push constants setting in persistent cache.

When generating the SkSL for a given shader we've already made some
decisions about whether to use push constants or not. However, the
SkSL->SPIR-V generator needs to know this in case it adds a uniform
(namely RTHeight).

Change-Id: Id8767924fff4e01227aca5f6fd6f8d5386e357bc
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/378321
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed