Roll src/third_party/skia 3de645cbca78..ad21d47cfa8d (15 commits)

[skia-flutter-autoroll]

https://skia.googlesource.com/skia.git/+log/3de645cbca78..ad21d47cfa8d

git log 3de645c..ad21d47 --date=short --no-merges --format='%ad %ae %s'
2019-11-11 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-11-11 bsalomon@google.com Clamp RGB outputs of GrYUVtoRGBEffect.
2019-11-11 herb@google.com Remove belongsToCache from SkStrike
2019-11-11 jlavrova@google.com Correct cluster index
2019-11-11 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skia/third_party/skcms e51ca8b81987..0e5f77218153 (1 commits)
2019-11-11 sgilhuly@chromium.org Roll Dawn, fix build issues in Skia Dawn
2019-11-11 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skia/third_party/skcms b118cb0ef477..e51ca8b81987 (1 commits)
2019-11-11 robertphillips@google.com Remove GrProgramDesc's need for the GrGpu
2019-11-11 mtklein@google.com add int3, vptest, jc
2019-11-11 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 652dbfc..012d151 (9 commits)
2019-11-11 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update SKP version
2019-11-11 mtklein@google.com add assert_true()
2019-11-11 bsalomon@google.com C++17
2019-11-11 mtklein@google.com don't allocate an interpreter register for stores
2019-11-11 rosasco@google.com Staging for Chromium to accept Skia-GL changes to come.

Created with:
gclient setdep -r src/third_party/skia@ad21d47cfa8d

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC halcanary@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

Bug: None
TBR=halcanary@google.com

[skia-flutter-autoroll]

Auto-roller completed checks. About to merge.