Roll src/third_party/skia 3838fe3c82b4..a7e1b45d9c28 (1 commits) (flutter#13117)

https://skia.googlesource.com/skia.git/+log/3838fe3c82b4..a7e1b45d9c28

git log 3838fe3c82b4..a7e1b45d9c28 --date=short --no-merges --format='%ad %ae %s'
2019-10-13 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update SKP version

Created with:
  gclient setdep -r src/third_party/skia@a7e1b45d9c28

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 csmartdalton@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=csmartdalton@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': '3838fe3c82b4c2bf5eb420a351a6f63ee668d8d7',
+  'skia_revision': 'a7e1b45d9c28974d908f89a8d0df65e1c52a33fd',
 
   # 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: cf6fcce8933676cb66739929493a01ce
+Signature: a0678dac3f825987cfb00780e50ab896
 
 UNUSED LICENSES: