This reverts commit 93f20f5629.
Reason for revert: Mismerge readded deleted files.
Original change's description:
> eliminated GrGLSLExpr
>
> Now that skslc performs all of the optimizations (and then some) that
> GrGLSLExpr is responsible for, it's just extra work for no benefit.
>
> Bug: skia:
> Change-Id: I40b0629e00a33873ed9fc6c0a9f41d8350221f9a
> Reviewed-on: https://skia-review.googlesource.com/14560
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>
>
TBR=bsalomon@google.com,ethannicholas@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Change-Id: Ia8b723594527afe34489fc78a4b49039081b6390
Reviewed-on: https://skia-review.googlesource.com/15154
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
5e550ab57e