Roll src/third_party/skia 8db6fdc:f96bee3

Roll src/third_party/skia 8db6fdc:f96bee3

Summary of changes available at:
https://chromium.googlesource.com/skia/+log/8db6fdc..f96bee3

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

Commits in this roll:
f96bee3 mtklein@chromium.org disable SkOpts on x86 iOS (simulator)
853336c joshualitt@chromium.org adding gm to use random scaler context
aa80e42 scroggo@chromium.org Fix straggling SK_VIRTUAL_CONSTRAINT_TYPEs
da9ccf1 joshualitt@google.com Revert of Move strike to subrun in GrAtlasTextContext (patchset #3 id:40001 of https://codereview.chromium.org/1257253005/)
bdb34d0 mtklein@chromium.org Move SkOpts.h back to src/core.
eae6200 bsalomon@google.com Some cleanup in GrTextureProvider and GrResourceProvider.
77d89f7 joshualitt@chromium.org Move strike to subrun in GrAtlasTextContext
7568d0b halcanary@google.com C API: add sk_xfermode.h, impl, test
85cd78d bsalomon@google.com Speculative fix for http://crbug.com/515966
ec994b6 halcanary@google.com Documentation spelling error
82314e9 halcanary@google.com Documentation: SkXfermode::Mode
d1ebe06 joshualitt@chromium.org Another small fix to GrFontScaler
383ff10 bsalomon@google.com Remove unnecessary virtual destructor on SkTArray
490b615 mtklein@chromium.org Port SkXfermode opts to SkOpts.h
685f277 reed@google.com use SkNextID::ImageID for android's stable id
65e96b4 joshualitt@chromium.org Modifying TextBlobCacheTest to use SkRandomScalerContext
88c7b98 bsalomon@google.com Make ANGLE perf decisions be runtime rather than compile time
7eb0945 mtklein@chromium.org Port SkUtils opts to SkOpts.
5119ac0 djsollen@google.com Update Android Testing apps to support release mode
b411b3b bsalomon@google.com Restore read pixels perf on ANGLE
96a52c8 reed@google.com remove drawimagerect flags, as skia no longer respects them

Review URL: https://codereview.chromium.org/1260793009

Cr-Commit-Position: refs/heads/master@{#341448}