Roll engine 05f8c8b24b92..96cba6c92a8a (5 commits) (#45597)

git@github.com:flutter/engine.git/compare/05f8c8b24b92...96cba6c92a8a

git log 05f8c8b24b92..96cba6c92a8a --first-parent --oneline
2019-11-26 skia-flutter-autoroll@skia.org Roll src/third_party/skia 8fa469d3bcd6..4f90f9d83183 (4 commits) (#14012)
2019-11-26 hterkelsen@users.noreply.github.com Refactor CanvasKit backend in preparation for platform views (#13935)
2019-11-26 iska.kaushik@gmail.com [vulkan] Bundle vulkan validation layer so files (#13930)
2019-11-25 chinmaygarde@google.com Don't crash but warn when the scene builder specifies no layers. (#14008)
2019-11-25 franciscojma@google.com Remove device independent mask (#14010)


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

bin/internal/engine.version

-05f8c8b24b923d5c044b0cc409c936be28e4039a
+96cba6c92a8aac3908d5146b8396ed97bde49410