Roll src/third_party/skia 9a5d1ab:a3a9ebc
Roll src/third_party/skia 9a5d1ab:a3a9ebc

Summary of changes available at:
https://chromium.googlesource.com/skia/+log/9a5d1ab..a3a9ebc

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

Commits in this roll:
a3a9ebc halcanary@google.com documentation: more API details and examples.
6e9aed9 junov@chromium.org Fixing src rect constraint support for drawImage with SkPicture
bca1400 reed@google.com remove pixel assert from ctable validator
e9d6095 joshualitt@chromium.org Cleanup Default Geo Proc API
2c32342 mtklein@chromium.org No one calls SkXfermode::GetProc16
56b78a7 mtklein@chromium.org Revert of Lay groundwork for SkOpts. (patchset #3 id:40001 of https://codereview.chromium.org/1255193002/)
513f265 joshualitt@chromium.org fix up GrImmediateDrawTarget.cpp
58fd2c8 mtklein@chromium.org Remove sk_memcpy32
ce2c505 mtklein@chromium.org Lay groundwork for SkOpts.

Review URL: https://codereview.chromium.org/1258073004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#340579}

Pluto-tv/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Chilledheart/chromium,Pluto-tv/chromium-crosswalk,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Chilledheart/chromium,axinging/chromium-crosswalk,Just-D/chromium-1,Just-D/chromium-1,axinging/chromium-crosswalk,Chilledheart/chromium,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Just-D/chromium-1,Chilledheart/chromium,Chilledheart/chromium,Just-D/chromium-1,Chilledheart/chromium,Just-D/chromium-1,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,Just-D/chromium-1,axinging/chromium-crosswalk,Chilledheart/chromium,axinging/chromium-crosswalk,Chilledheart/chromium,Pluto-tv/chromium-crosswalk,Chilledheart/chromium,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk