Roll src/third_party/skia/ d234afdc2..b460320a9 (9 commits)

https://skia.googlesource.com/skia.git/+log/d234afdc2e56..b460320a96df

$ git log d234afdc2..b460320a9 --date=short --no-merges --format='%ad %ae %s'
2018-04-17 mtklein Revert "low-hanging bilerp_clamp_8888 wins"
2018-04-16 mtklein low-hanging bilerp_clamp_8888 wins
2018-04-16 csmartdalton Don't support GrCubicEffect if float != fp32
2018-04-13 bungeman Add pixel geometry and dft selection to viewer app.
2018-04-16 csmartdalton Revert "ccpr: Implement conics"
2018-04-16 csmartdalton ccpr: Implement conics
2018-04-16 reed show cubic error-vectors anchored on pt(s) of max deviation
2018-04-16 herb Rename SkGlyphCacheGlobals to SkStrikeCache
2018-04-16 csmartdalton Add glFlush workaround for instanced draws on Skylake

Created with:
  roll-dep src/third_party/skia


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:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
TBR=scroggo@chromium.org

Change-Id: I395db6cc49729a477dabf03482080c657e814833
Reviewed-on: https://chromium-review.googlesource.com/1014665Reviewed-by: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#551214}

DEPS

@@ -86,7 +86,7 @@ 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': 'd234afdc2e562d395925ca3ac8294398608271a6',
+  'skia_revision': 'b460320a96dfddc859f18ed95fa9ade690bbeec6',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.