Roll Skia from 7737a5b to 5567a60 (8 revisions) (flutter#22146)

https://skia.googlesource.com/skia.git/+log/7737a5bd2510..5567a6091ceb

2020-10-27 [email protected] Guard traversal of certain kinds of mid-optimization IfStatement
2020-10-27 [email protected] Pass function arguments using SkSpan instead of count + ptr.
2020-10-27 [email protected] Add uma histogram tracking for the number of submit render passes.
2020-10-27 [email protected] Prototype helper functions from FP files before use.
2020-10-27 [email protected] Mangle function names as a separate step before emitting func-bodies.
2020-10-27 [email protected] remove absl experiment
2020-10-27 [email protected] use ieee divide
2020-10-27 [email protected] Made IRNode smaller

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 [email protected] 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': '7737a5bd251095d4eeedd855c0f13eafacafa7ce',
+  'skia_revision': '5567a6091cebf1cd5f87baa49fc4d42f67bcf226',
 
   # 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: 358c3055f33a91bff22d25103af58b74
+Signature: c004227d0c0f3ff680282a2455cbddd9
 
 UNUSED LICENSES: