Override getSaveLayerStrategy instead of willSaveLayer

willSaveLayer was removed in https://codereview.chromium.org/1537193002

Requires SkCanvas::SaveLayerFlagsToSaveFlags, added in ag/839104
(Ic78acd6d780245bd30b891e7dcabe29daacc17f4)

Change-Id: Idc49b38fc7939620267b4402ff3846b29f27c81a
(cherry picked from commit e208643a6f9d076274dd683c51a086b1e3679896)
2 files changed