Roll Skia from c21902c to 9615bcf (1 revision)

https://skia.googlesource.com/skia.git/+log/c21902c0d3cc..9615bcf71f2a

2020-10-30 johnstiles@google.com Revert "Moved SkSL data back into node classes"

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 jcgregorio@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/+doc/master/autoroll/README.md

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': 'c21902c0d3cc10cf13a8c5dfe9a610dc78e873ae',
+  'skia_revision': '9615bcf71f2a06900309062b6c218f5bf7ce795c',
 
   # 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: 3ff2360eff86b4fb3039a6bbea3f7134
+Signature: a34a0c9a361d1e4d429e487a889f05c0
 
 UNUSED LICENSES:
 
@@ -5602,6 +5602,7 @@ FILE: ../../../third_party/skia/src/sksl/SkSLModifiersPool.h
 FILE: ../../../third_party/skia/src/sksl/SkSLRehydrator.cpp
 FILE: ../../../third_party/skia/src/sksl/SkSLRehydrator.h
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLConstructor.cpp
+FILE: ../../../third_party/skia/src/sksl/ir/SkSLIRNode.cpp
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLNodeArrayWrapper.h
 ----------------------------------------------------------------------------------------------------
 Copyright 2020 Google LLC.