Roll src/third_party/skia 9548ea9d6ce1..b4d5af9c05f0 (8 commits)

https://skia.googlesource.com/skia.git/+log/9548ea9d6ce1..b4d5af9c05f0


git log 9548ea9d6ce1..b4d5af9c05f0 --date=short --no-merges --format='%ad %ae %s'
2018-09-13 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 52551d1cd8b6..a764381ef9f3 (1 commits)
2018-09-13 benjaminwagner@google.com Update Win version.
2018-09-13 allanmac@google.com Partial support for projective transforms
2018-09-13 mtklein@google.com add two more cases to P3 gm
2018-09-13 brianosman@google.com Add fallback path for drawing unsupported bitmap configs
2018-09-13 brianosman@google.com For Windows-Clang-Debug, use -fstandalone-debug to get better debug info
2018-09-13 michaelludwig@google.com Implement 2-pt conical gradient layout
2018-09-13 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader fcedef476ef1..52551d1cd8b6 (1 commits)


Created with:
  gclient setdep -r src/third_party/skia@b4d5af9c05f0

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

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=caryclark@chromium.org

Change-Id: I735368aebeb1b8b932adb159c295f68e0f3b1e38
Reviewed-on: https://chromium-review.googlesource.com/1226093Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#591231}

DEPS

@@ -105,7 +105,7 @@ 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': '9548ea9d6ce145f01e59d2d5fe8a988fdd5c35a6',
+  'skia_revision': 'b4d5af9c05f027130b0a94275bbc3ae37afd198a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.