Roll src/third_party/skia/ 93bb08050..bb6c41b1d (6 commits).
Roll src/third_party/skia/ 93bb08050..bb6c41b1d (6 commits).

https://chromium.googlesource.com/skia.git/+log/93bb080503ee..bb6c41b1dbe5

$ git log 93bb08050..bb6c41b1d --date=short --no-merges --format='%ad %ae %s'
2016-03-08 mtklein add f16 and srgb --configs to nanobench
2016-03-08 aleksandar.stojiljkovic 4377:  drawVertices crashes when shader+colorfilter in the paint
2016-03-08 joshualitt Create a small python driver for skiaserve
2016-03-08 robertphillips Rename SkSpecialImage::getBitmap to getBitmapDeprecated
2016-03-08 joshualitt Fix up GrAuditTrail to allow arbitrary reordering
2016-03-08 fmalita Fix 4f gradient swizzle post http://crrev.com/1774523002

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

Review URL: https://codereview.chromium.org/1776113002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#379908}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk