Roll src/third_party/skia 7156db2..c1baf6e (7 commits)

https://skia.googlesource.com/skia.git/+log/7156db260239..c1baf6e1c2a5

git log 7156db2..c1baf6e --date=short --first-parent --format='%ad %ae %s'
2020-05-14 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update Go Deps
2020-05-14 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 3b82fdc..664376e (10 commits)
2020-05-14 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src e334ec41436b..a6a8a49a2077 (501 commits)
2020-05-14 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/dawn f4df7916cacb..75ef5963b477 (8 commits)
2020-05-14 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 64da65bd1bd5..d748e1651af8 (2 commits)
2020-05-14 csmartdalton@google.com Reland "Add an implementation and log2 variants for Wang's formula"
2020-05-14 mtklein@google.com not all bots have `env`

Created with:
  gclient setdep -r src/third_party/skia@c1baf6e1c2a5

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC jlavrova@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: jlavrova@google.com

Author: skia-flutter-autoroll

DEPS

@@ -26,7 +26,7 @@ vars = {
   'skia_git': 'https://skia.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '7156db26023952a36cab59b7867d62fac3b27966',
+  'skia_revision': 'c1baf6e1c2a5454148adb516f0f833483b5a0353',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 8f1ba4ee96bc2c3ad91dde09d1118c4a
+Signature: eabcab883508d99e56e4451a00edc0b3
 
 UNUSED LICENSES:
 
@@ -5292,6 +5292,8 @@ FILE: ../../../third_party/skia/src/gpu/tessellate/GrDrawAtlasPathOp.cpp
 FILE: ../../../third_party/skia/src/gpu/tessellate/GrDrawAtlasPathOp.h
 FILE: ../../../third_party/skia/src/gpu/tessellate/GrMiddleOutPolygonTriangulator.h
 FILE: ../../../third_party/skia/src/gpu/tessellate/GrMidpointContourParser.h
+FILE: ../../../third_party/skia/src/gpu/tessellate/GrVectorXform.h
+FILE: ../../../third_party/skia/src/gpu/tessellate/GrWangsFormula.h
 ----------------------------------------------------------------------------------------------------
 Copyright 2020 Google Inc.