Roll skia 042fe0847b06..b6b7e7b6c8de (1 commits)

https://skia.googlesource.com/skia.git/+log/042fe0847b06..b6b7e7b6c8de

git log 042fe0847b06..b6b7e7b6c8de --date=short --first-parent --format='%ad %ae %s'
2019-12-03 mtklein@google.com Revert "replace SkColorSpaceXformSteps::Required()"

Created with:
  gclient setdep -r skia@b6b7e7b6c8de

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-skiabot-test-autoroll
Please CC borenet@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Bug: None
Tbr: borenet@google.com
Change-Id: Ifc4090c8dbe82e32f24be161fa2f30cfb7eded7a
Reviewed-on: https://skia-review.googlesource.com/c/skiabot-test/+/257699
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index 90fb330..f389b0f 100644
--- a/DEPS
+++ b/DEPS
@@ -3,7 +3,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.
-  'skia_revision': '042fe0847b06d63fa95d419f3c299710d0247d32',
+  'skia_revision': 'b6b7e7b6c8de74acb9dbb5b636634e20a27bcdaa',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.