Roll src/third_party/skia c89ca0ba09ed..b6e7ef1092b7 (25 commits)

https://skia.googlesource.com/skia.git/+log/c89ca0ba09ed..b6e7ef1092b7

git log c89ca0ba09ed..b6e7ef1092b7 --date=short --first-parent --format='%ad %ae %s'
2020-04-03 reed@google.com Use skvm infix in gradients
2020-04-03 csmartdalton@google.com Revert "Reland "Reland "Use glDraw.*BaseInstance calls to avoid deferred buffer binding"""
2020-04-03 csmartdalton@google.com Revert "Disable baseInstance on SwiftShader"
2020-04-03 csmartdalton@google.com Add an option to GrMeshTest to save to png
2020-04-03 mtklein@google.com remove little-used bit_clear() and bytes()
2020-04-03 csmartdalton@google.com Disable baseInstance on SwiftShader
2020-04-03 brianosman@google.com Switch back to stack-based SkSL interpreter
2020-04-03 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skia/third_party/skcms bd0abcd0646a..60d5d65325e6 (1 commits)
2020-04-03 mtklein@google.com harmonize rewrite-includes and gn-format checks
2020-04-03 hcm@google.com Update release schedule, notes
2020-04-03 reed@google.com refactor colorspacexform for skvm infix
2020-04-03 csmartdalton@google.com Merge GrVkVertexBuffer and GrVkIndexBuffer into GrVkMeshBuffer
2020-04-03 csmartdalton@google.com gn format gn/gpu.gni
2020-04-03 westont@google.com Include fetch-gn in SKQP build recipe.
2020-04-03 bsalomon@google.com Don't require color type to make proxy copies.
2020-04-03 mtklein@google.com schedule() in place
2020-04-03 bsalomon@google.com Incorporate sample count into RTC fallback color type.
2020-04-03 brianosman@google.com In 3D sample, fix the matrix used for normal transformation
2020-04-03 mtklein@google.com eliminate use of Usage in finalize
2020-04-03 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update Go Deps
2020-04-03 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 745e071241ab..1cc49bb2e230 (9 commits)
2020-04-03 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src deeb0d54..d086f1bd (467 commits)
2020-04-03 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader cb58662302c8..f99302c4efe6 (7 commits)
2020-04-02 bsalomon@google.com image_from_yuv_textures GM recreates YUVA image before each draw.
2020-04-02 csmartdalton@google.com Reland "Reland "Use glDraw.*BaseInstance calls to avoid deferred buffer binding""

Created with:
  gclient setdep -r src/third_party/skia@b6e7ef1092b7

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 michaelludwig@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/+/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: None
Tbr: michaelludwig@google.com
Change-Id: I849b0b88602b09e409ed5705928b5788012d56b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2135979Reviewed-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@{#756411}

DEPS

@@ -175,7 +175,7 @@ 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': 'c89ca0ba09ed6e13da7d201933d41ec1f183dafd',
+  'skia_revision': 'b6e7ef1092b7380852874498ab8ebff3a26f387f',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.