Roll src/third_party/skia 2a5511307d34..72f6f044cc73 (2 commits) (#7934)

https://skia.googlesource.com/skia.git/%2Blog/2a5511307d34..72f6f044cc73

git log 2a5511307d341228135a605a73fb6043be62b987..72f6f044cc739c4b7712c72d7e4af59b491629da --date=short --no-merges --format=%ad %ae %s
2019-02-23 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update go_deps asset
2019-02-23 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader d2452555986f..7c33e88eebb5 (1 commits)

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 (jvanverth@google.com), and stop
the roller if necessary.

DEPS

@@ -23,7 +23,7 @@ vars = {
   'fuchsia_git': 'https://fuchsia.googlesource.com',
   'github_git': 'https://github.com',
   'skia_git': 'https://skia.googlesource.com',
-  'skia_revision': '2a5511307d341228135a605a73fb6043be62b987',
+  'skia_revision': '72f6f044cc739c4b7712c72d7e4af59b491629da',
 
   # 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

-Signature: 62eb2c14fe4b4428702d88c9ec5b9389
+Signature: 3aee6c4ec034ff873a9ae0b20d84f12a
 
 UNUSED LICENSES: