Roll Skia from 6e5079a280ed to 51b74afb84d4 (5 revisions)

https://skia.googlesource.com/skia.git/+log/6e5079a280ed..51b74afb84d4

2020-11-25 michaelludwig@google.com Reland "Move conservative bounds tracking from SkCanvas to SkNoPixelsDevice"
2020-11-25 jvanverth@google.com Hide binaryArchive use in Viewer behind a flag.
2020-11-25 nifong@google.com update buildbot repo
2020-11-25 johnstiles@google.com Add support for boolean ^^ operator in SPIR-V.
2020-11-25 johnstiles@google.com Disallow unary minus on boolean vectors.

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 michaelludwig@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/+doc/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
Cq-Do-Not-Cancel-Tryjobs: true
Bug: None
Tbr: michaelludwig@google.com
Change-Id: I36f9f32400e1273062ff7903b83c58ae3402ea90
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2561101Reviewed-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@{#831122}

DEPS

@@ -200,7 +200,7 @@ 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': '6e5079a280ed97164ccdc286164ce6b4e97438ae',
+  'skia_revision': '51b74afb84d4150f67668e36e95563b39cb26b5b',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.