Roll Skia from 187b04b35777 to a5f3c3149033 (6 revisions)

https://skia.googlesource.com/skia.git/+log/187b04b35777..a5f3c3149033

2020-09-22 johnstiles@google.com Create VariableExpression struct for referencing inlined variables.
2020-09-22 robertphillips@google.com Fix a GrThreadSafeUniquelyKeyedProxyViewCache test
2020-09-22 johnstiles@google.com Fix crash when swizzling a bvec with constant 0/1s.
2020-09-22 johnstiles@google.com Add unit test for swizzling booleans.
2020-09-22 jvanverth@google.com Make sure we release all refs in GrD3DTextureResource::releaseResource.
2020-09-22 nifong@google.com Reland "include freetype in wasm build, see cl/332073924 for complete change"

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: I29fcd563fd7a41cad16def0f695978fe4039bc28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2424971Reviewed-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@{#809571}

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': '187b04b3577743ae5ad9fe8699181027d51624e1',
+  'skia_revision': 'a5f3c3149033dffc4d706fe34eb40714fc63d8c0',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.