Roll Skia from a5f3c3149033 to 3eb813e0cc13 (10 revisions)

https://skia.googlesource.com/skia.git/+log/a5f3c3149033..3eb813e0cc13

2020-09-22 adlai@google.com Migrate metal tools away from GrContext
2020-09-22 csmartdalton@google.com Extract SkFindCubicMidTangent from SkChopCubicAtMidTangent
2020-09-22 brianosman@google.com SkSL: Start refactoring pre-include handling
2020-09-22 johnstiles@google.com Add `rc` accessor method to SkMatrix.
2020-09-22 johnstiles@google.com Promote bool(k) to true/false during constant propagation.
2020-09-22 adlai@google.com Revert "Take GrContext private, GrDDLContext inherit from GrRecordingContext"
2020-09-22 johnstiles@google.com Fix ClangTidy bugprone-bool-pointer-implicit-conversion warning.
2020-09-22 johnstiles@google.com Fix nondeterminism when copying intrinsic functions.
2020-09-22 adlai@google.com Take GrContext private, GrDDLContext inherit from GrRecordingContext
2020-09-22 robertphillips@google.com Yet more GrThreadSafeUniquelyKeyedProxyViewCache purging tests

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/+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: chromium:1108408
Tbr: csmartdalton@google.com
Change-Id: If5accf0cddf2c61c34a3746d04ccdc6aaa26b3f3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2425265Reviewed-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@{#809641}

DEPS

@@ -195,7 +195,7 @@ 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': 'a5f3c3149033dffc4d706fe34eb40714fc63d8c0',
+  'skia_revision': '3eb813e0cc134767a10e9efd4811fc519eccb280',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.