Roll external/skia cfae284e0..20ae25ce1 (20 commits)

https://skia.googlesource.com/skia.git/+log/cfae284e0..20ae25ce1

2019-03-29 jvanverth@google.com Reland "Reland "Fix blurry edges on large ovals.""
2019-03-29 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 51562f15f4ad..5bb034db6243 (1 commits)
2019-03-29 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-03-29 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update go_deps asset
2019-03-29 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src eb8d3bc0b607..871828938944 (487 commits)
2019-03-29 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 8116d646b3f8..6446c8882fa3 (3 commits)
2019-03-29 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader fc8a46d0af96..51562f15f4ad (1 commits)
2019-03-29 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader c9d98716d2e7..fc8a46d0af96 (1 commits)
2019-03-29 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-03-29 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 37628f09a4c5..c9d98716d2e7 (1 commits)
2019-03-29 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-03-28 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-03-28 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 48b3587f8ea4..37628f09a4c5 (1 commits)
2019-03-28 fmalita@chromium.org [skottie] Tweak Shaper test tolerances to fix NativeFonts bots
2019-03-28 fmalita@chromium.org [skottie] Add support for BodyMovin 5.5.0 keyframes
2019-03-28 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-03-28 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 4aa9bf12f7e0..48b3587f8ea4 (1 commits)
2019-03-28 stani@google.com Add API to get canvas wrapped by SkPaintFilterCanvas
2019-03-28 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader a563dd8c5734..4aa9bf12f7e0 (1 commits)
2019-03-28 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).

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Test: Built and ran with Android
Bug: 128792554
Change-Id: I99300d6a210de166b8abdbc1a8d3ba942ca4119a