Roll Skia from ff5d8700b3a7 to b776a105e531 (4 revisions)

https://skia.googlesource.com/skia.git/+log/ff5d8700b3a7..b776a105e531

2020-11-11 jlavrova@google.com Some testing images in Google3 look slightly different with this change. Need to change them, too.
2020-11-11 brianosman@google.com GM to test (almost) all SkSL Angle/Trigonometric intrinsics
2020-11-11 reed@google.com make quickReject treat empty rects and paths the same
2020-11-11 herb@google.com remove unused getAdvance from SkScalerContext

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 jlavrova@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: jlavrova@google.com
Change-Id: If7cbfba2f36aba1b5f85fc6f65cd4eb54081e7ed
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2533441Reviewed-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@{#826542}

DEPS

@@ -197,7 +197,7 @@ 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': 'ff5d8700b3a7771a77bb841ca03e3789de03ee3b',
+  'skia_revision': 'b776a105e531e9dd91ffb78307dd7dd1f7b78700',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.