Re-land of "converted GrSimpleTextureEffect to sksl"

This reverts commit baf981f71614e7a2fbe6af2726e65126d431ed8e.

Bug: skia:
Change-Id: I36f6bfb616f1ec2b89043e3a6f7cbdf473bc9588
Reviewed-on: https://skia-review.googlesource.com/22369
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
21 files changed