Roll src/third_party/skia/ 4c9b6ef57..a02fe096a (3 commits; 2 trivial…

… rolls)

https://skia.googlesource.com/skia.git/+log/4c9b6ef57161..a02fe096a89c

$ git log 4c9b6ef57..a02fe096a --date=short --no-merges --format='%ad %ae %s'
2017-10-04 angle-deps-roller Roll skia/third_party/externals/angle2/ 682efdc47..035fd6b39 (3 commits)

Created with:
  roll-dep src/third_party/skia


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

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls


CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
TBR=scroggo@chromium.org

Change-Id: I7aeaf76ea01641d754fcb1c24cb812f9522fe19b
Reviewed-on: https://chromium-review.googlesource.com/699639
Reviewed-by: Skia Deps Roller <skia-deps-roller@chromium.org>
Commit-Queue: Skia Deps Roller <skia-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506325}

DEPS

@@ -45,7 +45,7 @@ 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': '4c9b6ef5716121971e80a4f16e89617d2e8f98ad',
+  'skia_revision': 'a02fe096a89c63180496406010640131cbab9911',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.