Roll src/third_party/skia f57b7cb8f0bc..8e63cab2e8fb (7 commits)

https://skia.googlesource.com/skia.git/+log/f57b7cb8f0bc..8e63cab2e8fb

git log f57b7cb8f0bc..8e63cab2e8fb --date=short --no-merges --format='%ad %ae %s'
2019-09-10 bsalomon@google.com Revert "Separate texture creation from uploading in GrGpu subclasses."
2019-09-10 senorblanco@chromium.org Dawn: implement staging buffer manager.
2019-09-10 senorblanco@chromium.org Update Dawn backend to accommodate recent Skia API changes.
2019-09-10 bsalomon@google.com Update new blurrect_compare GM to skip when SkCanvas::makeSurface will fail
2019-09-10 bsalomon@google.com Remove unused GM deferred canvas feature
2019-09-10 bsalomon@google.com Separate texture creation from uploading in GrGpu subclasses.
2019-09-10 ethannicholas@google.com fixed an assertion error with unspecified sksl array sizes

Created with:
  gclient setdep -r src/third_party/skia@8e63cab2e8fb

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 mtklein@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=mtklein@google.com

Bug: None
Change-Id: I3ff625d428e0936c6ac2dd9fb962b831334b352b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1796782Reviewed-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@{#695311}

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': 'f57b7cb8f0bc285de32b12b285b4744998d512ca',
+  'skia_revision': '8e63cab2e8fb559e8460279c41433dc2c2cfeef0',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.