Roll src/third_party/skia 57263c2e0ccd..5c7a3ac0e214 (15 commits) (#7536)

https://skia.googlesource.com/skia.git/%2Blog/57263c2e0ccd..5c7a3ac0e214

git log 57263c2e0ccddf4dd62814c427a39d9d615acbe5..5c7a3ac0e214984ef2b857098ef354a589069a36 --date=short --no-merges --format=%ad %ae %s
2019-01-17 benjaminwagner@google.com [infra] Update Win2016 image
2019-01-18 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 85ca189542cd..85ca71c2167b (4 commits)
2019-01-17 fmalita@chromium.org [skshaper] Build tweaks
2019-01-18 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 755d744023ff..7a36f4816fbf (1 commits)
2019-01-18 benjaminwagner@google.com Try a workaround for the Pixel ASAN push failure
2019-01-18 csmartdalton@google.com Convert GrRenderTargetOpList::tryConcat to an OOP-style method
2019-01-18 jvanverth@google.com Fix Bookmaker docs for MakeFromCompressed
2019-01-18 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src a9f87d1e43bb..3ff6f8afb698 (824 commits)
2019-01-18 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 739a7fbe086b..755d744023ff (18 commits)
2019-01-18 jvanverth@google.com Reland "Add compressed data support for SkImage."
2019-01-18 scroggo@google.com Add SK_API to SkHalfToFloat
2019-01-18 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 3159b2e52e05..85ca189542cd (1 commits)
2019-01-18 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update go_deps asset
2019-01-18 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 d46165e3db5a..3159b2e52e05 (2 commits)
2019-01-17 halcanary@google.com Revert "Add compressed data support for SkImage."

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 (halcanary@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': '57263c2e0ccddf4dd62814c427a39d9d615acbe5',
+  'skia_revision': '5c7a3ac0e214984ef2b857098ef354a589069a36',
 
   # 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: 3aa52983e4405f81773e567bcdc54023
+Signature: d3f701ef7f7c61acc3f147cfa15d3ca4
 
 UNUSED LICENSES: