Roll external/skia 2a2d732c3..d618027ea (20 commits)

https://skia.googlesource.com/skia.git/+log/2a2d732c3..d618027ea

2019-03-12 kjlubick@google.com [pathkit/canvaskit] Address race when uploading results
2019-03-12 enne@chromium.org Add validation to reading kRec_SkDescriptorTags
2019-03-12 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader f945a5e172d0..b4de34ef039f (1 commits)
2019-03-12 herb@google.com Move GlyphAndPos and PathAndPos to interface and rename.
2019-03-12 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-03-12 mtklein@google.com simplify matrix color filter clamps
2019-03-12 reed@google.com Initial add SkMixers
2019-03-12 mtklein@google.com add private non-copying SkReadBuffer::readString()
2019-03-12 stephana@google.com [infra] Add Pixel3 devices
2019-03-12 khushalsagar@chromium.org remote fonts: Remove debug asserts for deserialization failures.
2019-03-12 ethannicholas@google.com added SK_API to SkSK::Compiler
2019-03-12 mtklein@google.com remove unused clamp_a_dst
2019-03-12 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 c9bc33cff483..b6eb34122e07 (1 commits)
2019-03-12 robertphillips@google.com Always explicitly allocate except in Android Framework (take 3)
2019-03-12 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 7ce5de0c17bd..f945a5e172d0 (1 commits)
2019-03-12 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 6a1d92b526d4..7ce5de0c17bd (5 commits)
2019-03-12 jcgregorio@google.com Turn on CI/CD for api.skia.org. (skia)
2019-03-12 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 6193cb187e4a..6a1d92b526d4 (1 commits)
2019-03-12 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skia/third_party/skcms 04a7830913b3..10ed3a8a5eec (1 commits)
2019-03-12 mtklein@google.com simplify filterColor()

The AutoRoll server is located here: https://autoroll-internal.skia.org/r/android-master-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.

Test: Presubmit checks will test this change.
Change-Id: I0a5d1b5f91449b3c6283c3aa73b8d6a7a09d088d
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.