Roll external/skia ba651682a..360178920 (9 commits)

https://skia.googlesource.com/skia.git/+log/ba651682a..360178920

2018-10-05 reed@google.com trim unused SkDraw functions
2018-10-05 egdaniel@google.com Remove ability to sample textures in vertex or geometry shaders.
2018-10-05 egdaniel@google.com Remove debug only clearStencil virtual on GrGpu.
2018-10-05 brianosman@google.com Revert "Exercise newly exposed SkYUVIndex-based SkImage factories"
2018-10-05 reed@google.com split out SkDraw_text functions
2018-10-05 robertphillips@google.com Exercise newly exposed SkYUVIndex-based SkImage factories
2018-10-05 reed@google.com split SkPaint into separate impl files
2018-10-05 herb@google.com Split out SkRunFont and SkPaint
2018-10-05 fmalita@chromium.org [skottie] Optional path control points

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: I51d6e4e83aa1aff2f8f6e17cc20041b43ffda091
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.