Revert "Roll Skia from c73bff39bd21 to a87c5076a876 (21 revisions)"

This reverts commit 0cac1ce3.

Reason for revert: it brakes viz_unittests, see crbug.com/1134091

Original change's description:
> Roll Skia from c73bff39bd21 to a87c5076a876 (21 revisions)
>
> https://skia.googlesource.com/skia.git/+log/c73bff39bd21..a87c5076a876
>
> 2020-09-30 skia-autoroll@skia-public.iam.gserviceaccount.com Roll SwiftShader from 44be0942f9a8 to b042f4e70879 (15 revisions)
> 2020-09-30 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Dawn from b2a4e87ad274 to ad421a248adb (2 revisions)
> 2020-09-30 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Chromium from 339e4ec2 to cc47e0cd (351 revisions)
> 2020-09-30 johnstiles@google.com Allow more types of expressions to be directly inlined.
> 2020-09-30 ethannicholas@google.com Revert "Revert "moved SkSL Enum data into IRNode""
> 2020-09-29 robertphillips@google.com Make GrRRectBlurEffect use the thread-safe uniquely-keyed view cache
> 2020-09-29 kjlubick@google.com [canvaskit] Add Initial Typescript definitions/types.
> 2020-09-29 ethannicholas@google.com moved SkSL ExpressionStatement's data into IRNode
> 2020-09-29 robertphillips@google.com Make the SW blurred mask path use the thread-safe uniquely-keyed view cache
> 2020-09-29 johnstiles@google.com Revert "moved SkSL Enum data into IRNode"
> 2020-09-29 ethannicholas@google.com moved SkSL Enum data into IRNode
> 2020-09-29 brianosman@google.com Fix swizzle-of-swizzle lvalues in ByteCodeGenerator
> 2020-09-29 brianosman@google.com Add a benchmark that measures SkSL::Compiler startup time
> 2020-09-29 jsimmons@google.com Add an API for clearing the SkParagraph font and paragraph caches
> 2020-09-29 ethannicholas@google.com moved SkSL Constructor's data into IRNode
> 2020-09-29 robertphillips@google.com Have GrCircleBlurFragmentProcessor make use of thread safe view cache
> 2020-09-29 bsalomon@google.com Add sample count to GrVkImageInfo.
> 2020-09-29 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ANGLE from 2a09e89113af to ec42b1438fd2 (63 revisions)
> 2020-09-29 herb@google.com minimize includes and forwards for remote glyph cache
> 2020-09-29 ethannicholas@google.com moved SkSL FloatLiteral data into IRNode
> 2020-09-29 jvanverth@google.com Move MacOS 10.13 Metal jobs to 10.15.
>
> 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 brianosman@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:1018739,chromium:1096746,chromium:1108408,chromium:1130678,chromium:1132366
> Tbr: brianosman@google.com
> Test: Test: Test:Test: Test: CQTest: Test: ContextNoErrorTest31.DrawWithPPOTest: Test: Manual verification of Skia 'gn gen' on WindowsTest: Test: ProgramPipelineTest31.VerifyPpoLinkErrorSignalledCorrectlyTest: Test: angle_end2end_test --gtest_filter=*ETC1CompressedImageNPOT*Test: Test: angle_end2end_tests --gtest_filter=*ETC1CompressedImageDraws*Test: Test: dEQP.GLES31/functional_separate_shader_validation_es31_*
> Change-Id: I944383c547ca321da3fd774ca61e7e085537b6e1
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2439391
> Reviewed-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@{#811984}

TBR=brianosman@google.com,chromium-autoroll@skia-public.iam.gserviceaccount.com

Change-Id: If6cedf659b6405fea9f4cdf435e5d0b8881ed2da
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1018739
Bug: chromium:1096746
Bug: chromium:1108408
Bug: chromium:1130678
Bug: chromium:1132366
Bug: chromium:1134091
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
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2442729Reviewed-by: Michael Ershov <miersh@google.com>
Commit-Queue: Michael Ershov <miersh@google.com>
Auto-Submit: Michael Ershov <miersh@google.com>
Cr-Commit-Position: refs/heads/master@{#812629}

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': '4f09dd47da6ee00643d15de9396dceceef5439df',
+  'skia_revision': 'c73bff39bd21ae9b54b198a6dbf361ea3ceab591',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.