Roll src/third_party/skia d3509a42638a..6f6de6524c73 (5 commits) (#5819)

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': 'd3509a42638a06b328917723fcaad1d4393431b2',
+  'skia_revision': '6f6de6524c735e70e130456d973be603ead2d8df',
 
   # 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: b27955c580f9ae994990c5643b3c06fb
+Signature: 67c5a75ba172abdd242905ffaed7810f
 
 UNUSED LICENSES:
 
@@ -14245,6 +14245,7 @@ FILE: ../../../third_party/skia/bench/SkRasterPipelineBench.cpp
 FILE: ../../../third_party/skia/bench/StreamBench.cpp
 FILE: ../../../third_party/skia/bench/SwizzleBench.cpp
 FILE: ../../../third_party/skia/bench/TileImageFilterBench.cpp
+FILE: ../../../third_party/skia/bench/VertexColorSpaceBench.cpp
 FILE: ../../../third_party/skia/experimental/svg/model/SkPEG.h
 FILE: ../../../third_party/skia/experimental/svg/model/SkSVGAttribute.cpp
 FILE: ../../../third_party/skia/experimental/svg/model/SkSVGAttribute.h