Roll src/third_party/skia/ 4912d903b..dc3192b30 (7 commits) (#5142)

Auto-roller completed checks. Merging.

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': '4912d903b9bf32b6b929c2291a0384b634ca3473',
+  'skia_revision': 'dc3192b30a9e42aea8ff8d0c01ea585c79902704',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

travis/licenses_golden/licenses_third_party

-Signature: 7526f0e4696c7a824c1b985317d9f69f
+Signature: c1ceba4b426874919ff0d08583bd74a1
 
 UNUSED LICENSES:
 
@@ -17183,6 +17183,8 @@ FILE: ../../../third_party/skia/experimental/sksg/geometry/SkSGGeometryTransform
 FILE: ../../../third_party/skia/experimental/sksg/geometry/SkSGGeometryTransform.h
 FILE: ../../../third_party/skia/experimental/sksg/geometry/SkSGPlane.cpp
 FILE: ../../../third_party/skia/experimental/sksg/geometry/SkSGPlane.h
+FILE: ../../../third_party/skia/experimental/sksg/geometry/SkSGRoundEffect.cpp
+FILE: ../../../third_party/skia/experimental/sksg/geometry/SkSGRoundEffect.h
 FILE: ../../../third_party/skia/experimental/sksg/geometry/SkSGText.cpp
 FILE: ../../../third_party/skia/experimental/sksg/geometry/SkSGText.h
 FILE: ../../../third_party/skia/experimental/sksg/paint/SkSGGradient.cpp