Roll Skia from 4cb5c5e17289 to 70bb18d7c99d (10 revisions)

https://skia.googlesource.com/skia.git/+log/4cb5c5e17289..70bb18d7c99d

2020-11-06 tdenniston@google.com [svg] Implement feColorMatrix filter
2020-11-06 adlai@google.com Totally block trying to flush a ddl drawmgr
2020-11-06 kjlubick@google.com [canvaskit] Clean up readPixels API on Canvas and Image
2020-11-06 reed@google.com Move image sampling options into their own header
2020-11-06 johnstiles@google.com Reland "Add memsets to the GrBlockAllocator unit tests."
2020-11-06 johnstiles@google.com Improve constant folding for int vectors.
2020-11-06 johnstiles@google.com Add Literal<T> and getVecComponent<T> for template code.
2020-11-06 brianosman@google.com Fix merge conflict in RELEASE_NOTES.txt
2020-11-06 kcbanner@gmail.com - GrGLPath: Fix hitting an assert when a style applies a path effect that results in an empty path
2020-11-06 egdaniel@google.com Fix formatting nit.

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 bsalomon@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: bsalomon@google.com
Change-Id: Icdb7a30f5f3ce94e2a0543342edbe26fe40067ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2522422Reviewed-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@{#825087}

DEPS

@@ -206,7 +206,7 @@ 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': '4cb5c5e1728933637ca9b8653ff95f876871dc9b',
+  'skia_revision': '70bb18d7c99de6c649379b7eef134b10ced29b34',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.