Roll src/third_party/skia f49debf07dc6..2686d69bf05b (15 commits)

[skia-flutter-autoroll]

https://skia.googlesource.com/skia.git/+log/f49debf07dc6..2686d69bf05b

git log f49debf..2686d69 --date=short --first-parent --format='%ad %ae %s'
2020-04-17 michaelludwig@google.com Reland "Rename GrShape to GrStyledShape"
2020-04-17 michaelludwig@google.com Reland "Respect wrap mode when decimating for blur"
2020-04-17 bsalomon@google.com Reland "Revert "Revert "GrDisplacementEffect uses GrTextureEffect."""
2020-04-17 fmalita@chromium.org [skottie] Initial inner shadow layer style support
2020-04-17 michaelludwig@google.com Revert "Rename GrShape to GrStyledShape"
2020-04-17 ethannicholas@google.com Revert "Converted texture and runtime effects to use GrMatrixEffect"
2020-04-17 bsalomon@google.com Put top level FPs into their own functions
2020-04-17 mtklein@google.com support JITMode::Stack on ARM
2020-04-17 ethannicholas@google.com Converted texture and runtime effects to use GrMatrixEffect
2020-04-17 bsalomon@google.com Disable testing of D3D9 ANGLE backend on NVIDIA
2020-04-17 mtklein@google.com refactor arm instructions
2020-04-17 mtklein@google.com set up stack frames on aarch64
2020-04-17 michaelludwig@google.com Revert "Respect wrap mode when decimating for blur"
2020-04-17 senorblanco@chromium.org Dawn: implement fences, callbacks and Finish (syncGpu) semantics.
2020-04-17 mtklein@google.com test overdraw filter via public api

Created with:
gclient setdep -r src/third_party/skia@2686d69bf05b

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 kjlubick@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: kjlubick@google.com