Roll src/third_party/skia be4787124940..3375a8848278 (8 commits)

https://skia.googlesource.com/skia.git/+log/be4787124940..3375a8848278

git log be4787124940..3375a8848278 --date=short --no-merges --format='%ad %ae %s'
2019-09-26 mtklein@google.com roll GN
2019-09-26 mtklein@google.com Revert "hsw::S32_alpha_D32_filter_DX"
2019-09-26 kjlubick@google.com [canvaskit] remove debugging code
2019-09-26 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-09-26 egdaniel@google.com Fix vulkan caps checks for external formats.
2019-09-26 robertphillips@google.com Add mipmap support to SkPixmap flavor of createBackendTexture
2019-09-26 csmartdalton@google.com Revert "Remove the resolve rect and resolve types from GrRenderTarget"
2019-09-26 kjlubick@google.com [canvaskit] Create SkFontMgr from passed in data

Created with:
  gclient setdep -r src/third_party/skia@3375a8848278

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-autoroll
Please CC bungeman@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

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
TBR=bungeman@google.com

Bug: None
Change-Id: I691107a9b12666aa86e4c52728430af2ebcd7271
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1827828Reviewed-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@{#700473}

DEPS

@@ -162,7 +162,7 @@ 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': 'be47871249402225d4aa2e85eb961f7dfb703c74',
+  'skia_revision': '3375a8848278320b2d166521b43ca23d09df0e16',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.