Roll Skia from 81454dfaa92a to c950e05bafcd (19 revisions)

https://skia.googlesource.com/skia.git/+log/81454dfaa92a..c950e05bafcd

2020-06-18 mtklein@google.com clean up old idea about nullptr/sRGB
2020-06-18 adlai@google.com Consolidate GrDrawingManager <-> GrRenderTask lifecycle
2020-06-18 egdaniel@google.com Revert "Don't release vk memory allocator until context is deleted."
2020-06-18 mtklein@google.com runtime shader children on skvm backend
2020-06-18 egdaniel@google.com Don't release vk memory allocator until context is deleted.
2020-06-18 nigeltao@google.com Reland "Allow building with Wuffs v0.3, not just v0.2"
2020-06-18 bsalomon@google.com Merge ShaderMode and FilterLogic enums in GrTextureEffect
2020-06-18 johnstiles@google.com Fix stack-buffer overrun in appendVAList.
2020-06-18 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ANGLE from 98d0f30c4393 to fa3d64bf72d6 (41 revisions)
2020-06-18 rmistry@google.com Change URL in skia_css3gradients_desktop.py
2020-06-18 bsalomon@google.com Make Clip test FP use texture effect child
2020-06-18 bsalomon@google.com Use child effects for LUTs in perline noise effects
2020-06-18 bsalomon@google.com Update generated file
2020-06-18 bsalomon@google.com GrRRectBlurEffect uses child for nine patch
2020-06-18 dmazzoni@chromium.org Get rid of deprecated API to add children to PDF tag nodes.
2020-06-18 egdaniel@google.com Fix perspective fragcoord value in d3d.
2020-06-18 brianosman@google.com Support sample() in ByteCodeGenerator (but not the interpreter)
2020-06-18 bsalomon@google.com Use child effect for integral in GrRectBlurEffect
2020-06-18 djsollen@google.com Manually update ANGLE DEPS

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 djsollen@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
Bug: chromium:1078330,chromium:1081806,chromium:1085996,chromium:1091259,chromium:1092743,chromium:1094634,chromium:607777
Tbr: djsollen@google.com
Test: Test: Test: Build/CQTest: Test: angle_end2end_testsTest: Test: angle_end2end_tests.exe --gtest_filter=ImageRespecificationTest*Test: Test: dEQP-GLES31.functional.image_load_store.*.format_reinterpret.*
Change-Id: I5aecf7ec290346781fa50d5ddd3817088aa62326
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2252523Reviewed-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@{#779985}

DEPS

@@ -182,7 +182,7 @@ 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': '81454dfaa92a202f905c4d808c5fb343fd96acff',
+  'skia_revision': 'c950e05bafcdec649c81165214a9bb031d57ebea',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.