Roll src/third_party/skia 4f738832a976..3bdc3f5f9c0b (4 commits)

https://skia.googlesource.com/skia.git/+log/4f738832a976..3bdc3f5f9c0b


git log 4f738832a976..3bdc3f5f9c0b --date=short --no-merges --format='%ad %ae %s'
2018-12-11 bsalomon@google.com Move some Gr headers from include/gpu to include/private and src/gpu.
2018-12-11 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 2661e8408331..7cfb50cd5f50 (1 commits)
2018-12-11 scroggo@google.com Treat kWEBP encode with quality=100 as lossless
2018-12-11 reed@google.com change convex scan converter to be defensive


Created with:
  gclient setdep -r src/third_party/skia@3bdc3f5f9c0b

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=luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux-blink-rel;luci.chromium.try:linux-chromeos-compile-dbg;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel

BUG=chromium:899689
TBR=ethannicholas@chromium.org

Change-Id: I8654098ad7ea12d70046b041654d0cfddc1d07ee
Reviewed-on: https://chromium-review.googlesource.com/c/1372088Reviewed-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@{#615597}

DEPS

@@ -115,7 +115,7 @@ 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': '4f738832a9762ca61c8eac9dadd2830c8ba903bd',
+  'skia_revision': '3bdc3f5f9c0bf62c1eb7932f67f9f4838782a36a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.