Revert "Revert "Add GM to test SkToSRGBColorFilter""

This reverts commit a1fc47169a9eb2ba5d1cf55b60f77405394b449c.

Reason for revert: serialization fixed

Original change's description:
> Revert "Add GM to test SkToSRGBColorFilter"
> 
> This reverts commit fa3ed03720b5083afd3620c9239863f05f2eedbd.
> 
> Reason for revert: GM is failing on a lot of bots
> 
> Original change's description:
> > Add GM to test SkToSRGBColorFilter
> > 
> > Bug: skia:
> > Change-Id: If342ad5503d1b427f2d04ce15b75f0f7fa2706c1
> > Reviewed-on: https://skia-review.googlesource.com/26426
> > Reviewed-by: Mike Klein <mtklein@google.com>
> > Commit-Queue: Brian Osman <brianosman@google.com>
> 
> TBR=djsollen@google.com,mtklein@google.com,brianosman@google.com
> 
> Change-Id: I92fe179ead6d115b32b3a9533b8ee0e10bb3ee43
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: skia:
> Reviewed-on: https://skia-review.googlesource.com/26522
> Reviewed-by: Kevin Lubick <kjlubick@google.com>
> Commit-Queue: Kevin Lubick <kjlubick@google.com>

TBR=djsollen@google.com,mtklein@google.com,kjlubick@google.com,brianosman@google.com

Change-Id: Id4db253a149ff978456ecfe55c8e551e325c98ac
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/26511
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/gn/gm.gni b/gn/gm.gni
index 7fd787cea8..97f8d83ab6 100644
--- a/gn/gm.gni
+++ b/gn/gm.gni
@@ -277,6 +277,7 @@ gm_sources = [
   "$_gm/spritebitmap.cpp",
   "$_gm/srcmode.cpp",
   "$_gm/srgb.cpp",
+  "$_gm/srgb_color_filter.cpp",
   "$_gm/stlouisarch.cpp",
   "$_gm/stringart.cpp",
   "$_gm/stroke_rect_shader.cpp",