Roll external/skia 22d77cb36..3a8a277d9 (7 commits)

https://skia.googlesource.com/skia.git/+log/22d77cb36..3a8a277d9

2018-01-03 angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com Roll skia/third_party/externals/angle2/ 8b5e8fdb3..36937a64f (1 commit)
2018-01-03 liyuqian@google.com Update 2pt conical document
2018-01-03 reed@google.com Revert "Revert "remove legacy support for old old picture versions""
2018-01-03 halcanary@google.com SkFloatToDecimal moved to src/utils
2018-01-03 kjlubick@google.com Add SkPipe fuzzer
2018-01-03 bsalomon@google.com Make GrShape lazily initialize an original path for gen id change listeners
2018-01-03 angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com Roll skia/third_party/externals/angle2/ 93b059db4..8b5e8fdb3 (1 commit)

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Change-Id: Ic5b650faa93dbf98d5ad745293e691a11240d94f
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