Roll src/third_party/skia a4828a13c27a..7d7aaf46aeb4 (14 commits)

https://skia.googlesource.com/skia.git/+log/a4828a13c27a..7d7aaf46aeb4

git log a4828a13c27a..7d7aaf46aeb4 --date=short --no-merges --format='%ad %ae %s'
2019-10-14 robertphillips@google.com Slim down GrFragmentProcessor::TextureSampler and GrPrimitiveProcessor::TextureSampler
2019-10-14 jcgregorio@google.com Fix usage of depot_tools in containers.
2019-10-14 jvanverth@google.com Reland "Minimal iOS app: Perform present subsequent to flush"
2019-10-14 benjaminwagner@google.com [infra] Retry failed pushes in Android flavor
2019-10-14 mtklein@google.com insist SkPngEncoder's input is initialized
2019-10-14 senorblanco@chromium.org Dawn backend: update to Skia API changes.
2019-10-14 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skia/third_party/skcms e9158fd9e492..8c5dee1e7fe2 (4 commits)
2019-10-14 jvanverth@google.com Revert "Minimal iOS app: Perform present subsequent to flush"
2019-10-14 csmartdalton@google.com Allow fullscreen clears when generating blurs
2019-10-14 jvanverth@google.com Remove fake SDK #defines for Metal backend.
2019-10-14 jvanverth@google.com Minimal iOS app: Perform present subsequent to flush
2019-10-14 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skia/third_party/skcms ed9daeb11a98..e9158fd9e492 (1 commits)
2019-10-14 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skia/third_party/skcms a52db47aa53f..ed9daeb11a98 (1 commits)
2019-10-14 robertphillips@google.com Reduce usage of GrProgramDesc::KeyHeader

Created with:
  gclient setdep -r src/third_party/skia@7d7aaf46aeb4

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 csmartdalton@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=csmartdalton@google.com

Bug: chromium:1013368,chromium:None,chromium:1008192,chromium:None,chromium:None
Change-Id: I68ce3cf812306bd59ca42f9d6742be8785620c20
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1859821Reviewed-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@{#705694}

DEPS

@@ -167,7 +167,7 @@ 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': 'a4828a13c27a0bbd2a2b9169916a0b4d58853df4',
+  'skia_revision': '7d7aaf46aeb450b983ff5ac8833d6ca3065671a8',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.