Roll src/third_party/skia 3566d44:d32087a

Roll src/third_party/skia 3566d44:d32087a

Summary of changes available at:
https://chromium.googlesource.com/skia/+log/3566d44..d32087a

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
TBR=tomhudson@google.com

Commits in this roll:
d32087a herb@google.com Add shared mutex benchmark.
f260851 tomhudson@google.com Revert of add ImageShader, sharing code with its Bitmap cousin (patchset #10 id:180001 of https://codereview.chromium.org/1342113002/ )
bcfd511 herb@google.com Benchmark all mutex implementations.
5ce341f robertphillips@google.com Add slice tool
0b93e31 reed@google.com add ImageShader, sharing code with its Bitmap cousin
3b0d532 fmalita@chromium.org Purge cached resources on SkImage destruction.

Review URL: https://codereview.chromium.org/1356993002

Cr-Commit-Position: refs/heads/master@{#349741}