Roll Skia from 126788e087af to ae2171eba699 (3 revisions)

https://skia.googlesource.com/skia.git/+log/126788e087af..ae2171eba699

2021-07-30 johnstiles@google.com Fixup enum name in SkFlattenable.
2021-07-30 johnstiles@google.com Create test case to repro skia:12212.
2021-07-30 rohitrao@google.com Removes a deprecated call to CTGetCoreTextVersion() when compiling for iOS 14+.

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 kjlubick@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/main/autoroll/README.md

DEPS

@@ -27,7 +27,7 @@ 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': '126788e087af7d1af2f297c679180afdb2661616',
+  'skia_revision': 'ae2171eba6991eab7a212d33bf8e1203aec6f860',
 
   # 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: dcfc1ff9b77717a93acc9b9090001d04
+Signature: f1b1c5581e21b96c7e4665d7509dac1d
 
 UNUSED LICENSES:
 
@@ -4020,6 +4020,7 @@ FILE: ../../../third_party/skia/gm/aarecteffect.cpp
 FILE: ../../../third_party/skia/gm/colorspace.cpp
 FILE: ../../../third_party/skia/gm/drawglyphs.cpp
 FILE: ../../../third_party/skia/gm/largeclippedpath.cpp
+FILE: ../../../third_party/skia/gm/skbug_12212.cpp
 FILE: ../../../third_party/skia/include/private/GrMtlTypesPriv.h
 FILE: ../../../third_party/skia/include/utils/SkOrderedFontMgr.h
 FILE: ../../../third_party/skia/infra/bots/task_drivers/recreate_skps/recreate_skps.go