Revert "Revert "Remove deadcode for sRGB image shading.""

This reverts commit e08e639063dd5476b5a1a24c0f0dc8f1139bfd8d.

Reason for revert: revert was not clean

Original change's description:
> Revert "Remove deadcode for sRGB image shading."
> 
> This reverts commit 51f6a0f89e55b2c0f102aa7963320a23c586e71d.
> 
> Reason for revert: crazy attempt to fix chrome roll
> 
> Original change's description:
> > Remove deadcode for sRGB image shading.
> > 
> > Change-Id: I9d98da67d97b64ab55cf44b9ae447882dccda1ca
> > Reviewed-on: https://skia-review.googlesource.com/20695
> > Reviewed-by: Mike Klein <mtklein@chromium.org>
> > Commit-Queue: Herb Derby <herb@google.com>
> 
> TBR=mtklein@chromium.org,mtklein@google.com,herb@google.com,reed@google.com
> 
> # Not skipping CQ checks because original CL landed > 1 day ago.
> 
> Change-Id: Icab02936d6c18e50b8de353aa1cd4c225e15e0bf
> Reviewed-on: https://skia-review.googlesource.com/20800
> Reviewed-by: Mike Reed <reed@google.com>

TBR=mtklein@chromium.org,mtklein@google.com,herb@google.com,reed@google.com

Change-Id: Ibc579a5a95e78cb257e8d443dbb905db3761e84a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/20802
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
42 files changed