Roll src/third_party/skia 6dd4b209091b..b609e6dc6a02 (1 commits) (#5786)

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': '6dd4b209091b876832218e8adf1909669960bf98',
+  'skia_revision': 'b609e6dc6a02336aed04caaddcdd5ccfbe7ba9ec',
 
   # 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: a4330b4cc2f8fcb33366c1679747b4e7
+Signature: fe8f50abcc4fc21f3470cd0689b18a6b
 
 UNUSED LICENSES:
 
@@ -16958,6 +16958,7 @@ FILE: ../../../third_party/skia/gm/polygonoffset.cpp
 FILE: ../../../third_party/skia/gm/scaledemoji.cpp
 FILE: ../../../third_party/skia/gm/shadermaskfilter.cpp
 FILE: ../../../third_party/skia/gm/sharedcorners.cpp
+FILE: ../../../third_party/skia/gm/skinning.cpp
 FILE: ../../../third_party/skia/include/android/SkAnimatedImage.h
 FILE: ../../../third_party/skia/include/core/SkCanvasVirtualEnforcer.h
 FILE: ../../../third_party/skia/include/core/SkCoverageMode.h