Roll src/third_party/skia b875cc7..f996311 (2 commits) (#10974)

https://skia.googlesource.com/skia.git/+log/b875cc709c7f..f99631100372

git log b875cc7..f996311 --date=short --no-merges --format='%ad %ae %s'
2019-08-13 mtklein@google.com extend lifetimes for hoisted used in loop
2019-08-13 chinmaygarde@google.com Only use thread_local on aarch64 iOS build variants.

Created with:
  gclient setdep -r src/third_party/skia@f99631100372

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

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

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


Bug: None
TBR=scroggo@google.com

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': 'b875cc709c7f7795dba455dbb9d67d1360e27d72',
+  'skia_revision': 'f99631100372187eac92ff008e30065c06b4212f',
 
   # 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: 70d32add5d08792c94c6457ef97ea88f
+Signature: 676270d5a11ca5c840616d01da81d2db
 
 UNUSED LICENSES: