Roll src/third_party/skia 5c211130646b..1f43a4359d7d (5 commits) (#7767)

https://skia.googlesource.com/skia.git/%2Blog/5c211130646b..1f43a4359d7d

git log 5c211130646b41ed5d703f4c6f0f8133f9b58726..1f43a4359d7d1b2e6cae144c3f510c0ffa8e60ec --date=short --no-merges --format=%ad %ae %s
2019-02-08 fmalita@chromium.org [skottie] Add drop shadow support
2019-02-09 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src 3e6732ee4ac8..99d98c846f9b (360 commits)
2019-02-08 gkaiser@google.com SkPathOpsTSect: Avoid null dereference in asserts
2019-02-08 gkaiser@google.com bench: Fix a couple presumed copy/paste errors
2019-02-08 gkaiser@google.com SkLiteDL: Don't use move()d object

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 (fmalita@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': '5c211130646b41ed5d703f4c6f0f8133f9b58726',
+  'skia_revision': '1f43a4359d7d1b2e6cae144c3f510c0ffa8e60ec',
 
   # 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: 509aa8ea7155c1ab39a4e30cac0eaf6b
+Signature: 0ceb867a57161d1f3bbc943ccf14708a
 
 UNUSED LICENSES:
 
@@ -4342,6 +4342,8 @@ FILE: ../../../third_party/skia/include/private/GrContext_Base.h
 FILE: ../../../third_party/skia/include/private/GrImageContext.h
 FILE: ../../../third_party/skia/include/private/GrRecordingContext.h
 FILE: ../../../third_party/skia/include/private/SkVx.h
+FILE: ../../../third_party/skia/modules/sksg/include/SkSGRenderEffect.h
+FILE: ../../../third_party/skia/modules/sksg/src/SkSGRenderEffect.cpp
 FILE: ../../../third_party/skia/modules/sksg/src/SkSGTransformPriv.h
 FILE: ../../../third_party/skia/samplecode/SampleThinAA.cpp
 FILE: ../../../third_party/skia/src/core/SkDescriptor.cpp