Roll src/third_party/skia/ 8d2ba44c9..c9a642edf (10 commits)

https://skia.googlesource.com/skia.git/+log/8d2ba44c9cba..c9a642edf2d1

$ git log 8d2ba44c9..c9a642edf --date=short --no-merges --format='%ad %ae %s'
2018-03-19 bsalomon New read pixels implementation that is simpler but does all conversions on CPU.
2018-03-19 reed handle divide by zero in paint
2018-03-19 herb Remove a ctor from SkAutoGlyphCache; removal continues.
2018-03-19 egdaniel Make sure we set stencil layout when doing copy as draw
2018-03-19 robertphillips Fix GrTextureStripAtlasManager cleanup order bug
2018-03-16 kdonev Support x86 build with VS 2015
2018-03-14 kjlubick [skpbench] Use android's perf settings for Pixel C
2018-03-19 kjlubick Avoid bad alloc in SkReadBuffer
2018-03-19 angle-skia-autoroll Roll skia/third_party/externals/angle2/ dfebe9b2d..3761dc7bf (1 commit)
2018-03-19 caryclark fix op fuzz

Created with:
  roll-dep src/third_party/skia
BUG=chromium:820703


The AutoRoll server is located here: https://autoroll.skia.org

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.


CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;luci.chromium.try:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
TBR=jvanverth@chromium.org

Change-Id: I6e098e7b7056791ccf28d22a30e854bc24312c1e
Reviewed-on: https://chromium-review.googlesource.com/969117
Commit-Queue: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Reviewed-by: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#544082}

DEPS

@@ -79,7 +79,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.
-  'skia_revision': '8d2ba44c9cba790cfd8ace80de9e15972bccbe5d',
+  'skia_revision': 'c9a642edf2d1c7f5380fe829adbb1a692f9969a6',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.