Roll src/third_party/skia 7e2c0614a2fd..4652930a7dfc (5 commits) (#8232)

https://skia.googlesource.com/skia.git/%2Blog/7e2c0614a2fd..4652930a7dfc

git log 7e2c0614a2fd08e418b789939dfdad9b76e70fa7..4652930a7dfc23d368d96b2ff46305a94172511c --date=short --no-merges --format=%ad %ae %s
2019-03-20 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 00ba176c0c40..c296806411fb (2 commits)
2019-03-20 mtklein@google.com remove some more SK- in DrawCommand
2019-03-20 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src ca0130108117..b57a03014063 (635 commits)
2019-03-20 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-03-20 egdaniel@google.com Reduce use of map buffers on ARM vulkan.

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 (brianosman@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': '7e2c0614a2fd08e418b789939dfdad9b76e70fa7',
+  'skia_revision': '4652930a7dfc23d368d96b2ff46305a94172511c',
 
   # 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: 69cdeba5983041274e6ecad0313aaa0a
+Signature: 5f42cdf6490f96a34eedd3043ec9c0eb
 
 UNUSED LICENSES: