[graphite] Remove makeWithCTM from PrecompileShader

Having makeWithCTM on PrecompileShader kinda paralleled having it on SkShaderBase in the normal API. Unfortunately, doing so gave it too much visibility w/in the Precompilation API. Replacing its sole internal usage with an explicit call to the factory function is preferable.

Bug: b/259548724
Change-Id: Ibdf14fab25e9f2c24276a16d01d1bd20987418d1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/855440
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
3 files changed