Roll src/third_party/skia e3e80b7..0a57971 (16 commits) (#8035)

https://skia.googlesource.com/skia.git/%2Blog/e3e80b7edfd1..0a57971f0544

git log e3e80b7..0a57971 --date=short --no-merges --format=%ad %ae %s
2019-03-04 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2019-03-01 halcanary@google.com SkQP: fix five tests
2019-03-04 robertphillips@google.com Reduce usage of SkCanvas::flush
2019-03-04 fmalita@chromium.org Fix handling of SkSL nullable FPs
2019-03-01 mtklein@google.com mark lowp TODOs
2019-03-04 brianosman@google.com Add SkParticleValue to allow further customization of curve behavior
2019-03-04 herb@google.com Introduce SkStrikeCacheInterface
2019-03-04 egdaniel@google.com Add API for creating SkImage from AHB while uploading data to it.
2019-03-04 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 4d15338..0e1ce2e (1 commits)
2019-03-04 robertphillips@google.com Clean up GrSurfaceContext's relationship with GrRecordingContext
2019-02-28 mtklein@google.com add kRGBA_F16Norm_SkColorType
2019-03-01 robertphillips@google.com Remove (unnecessary?) flush in RenderYUVAToRGBA
2019-03-04 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src aae499d4d09d..8e3cddfd5a43 (217 commits)
2019-03-04 halcanary@google.com SkQP: fix androidx (follows 2ccdd2b)
2019-03-04 robertphillips@google.com Remove peekProxy's side-effect behavior
2019-03-04 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 823ca85..bb30529 (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 (reed@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': 'e3e80b7edfd1d31724ef789b7d879d0fee5e52f2',
+  'skia_revision': '0a57971f054410af9f0b29e776b8f186540c7a1c',
 
   # 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: 6a5e4c2b1031c3a8cc1b8d5e0524d4dc
+Signature: 7a19060fde0d980ac4a36861c31ada7e
 
 UNUSED LICENSES:
 
@@ -4847,6 +4847,7 @@ FILE: ../../../third_party/skia/modules/sksg/src/SkSGTransformPriv.h
 FILE: ../../../third_party/skia/samplecode/SampleSG.cpp
 FILE: ../../../third_party/skia/samplecode/SampleThinAA.cpp
 FILE: ../../../third_party/skia/src/core/SkDescriptor.cpp
+FILE: ../../../third_party/skia/src/core/SkStrikeInterface.h
 FILE: ../../../third_party/skia/src/gpu/GrAHardwareBufferUtils.cpp
 FILE: ../../../third_party/skia/src/gpu/GrAHardwareBufferUtils.h
 FILE: ../../../third_party/skia/src/gpu/GrBaseContextPriv.h