Roll external/skia a9e241d35..ab244f045 (10 commits)
https://skia.googlesource.com/skia.git/+log/a9e241d35..ab244f045
2017-05-03 fmalita@chromium.org Revert "Revert "Reland: Remove SkLights include from SkCanvas.h""
2017-05-03 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2017-05-03 csmartdalton@google.com Convert GrMesh to a struct
2017-05-03 msarett@google.com Delete SkBitmap::copyTo()
2017-05-03 ethannicholas@google.com sksl SPIR-V sampledBuffer support
2017-05-03 mtklein@chromium.org dither stage
2017-05-03 benjaminwagner@google.com Upgrade Windows 10 to v1703.
2017-05-03 robertphillips@google.com Allow TextureSamplers to have null GrTexture pointer
2017-05-03 herb@google.com Add sweep gradient to SkRasterPipeline
2017-05-03 recipe-roller@chromium.org Roll recipe dependencies (trivial).
Test: Presubmit checks will test this change.
Change-Id: I1d8a2903a2840e2aaa9cf6762b0d147915adfc01