Roll engine 5f5713e33971..af04338413c3 (8 commits) (#44486)

git@github.com:flutter/engine.git/compare/5f5713e33971...af04338413c3

git log 5f5713e33971..af04338413c3 --no-merges --oneline
2019-11-08 a-siva@users.noreply.github.com Manual roll of Dart e68ca9b652acdb642668a6acb5f630d5be6c03da...fa4379946109467c8a48f20f19d83d7c72968a3e (flutter/engine#13756)
2019-11-08 ychris@google.com Revert "Reland "Guarding EAGLContext used by Flutter #13314" (#13755)" (flutter/engine#13757)
2019-11-08 ferhat@gmail.com [web] Support gif/webp animations, Speed up image drawing in BitmapCanvas.  (flutter/engine#13748)
2019-11-08 ychris@google.com Reland "Guarding EAGLContext used by Flutter #13314" (flutter/engine#13755)
2019-11-08 gspencergoog@users.noreply.github.com Move TextRange from the framework to dart:ui. (flutter/engine#13747)
2019-11-08 skia-flutter-autoroll@skia.org Roll src/third_party/skia 8c1e265f6f81..c88d1774ed50 (7 commits) (flutter/engine#13754)
2019-11-08 ychris@google.com Revert "Always use `IOSGLContextSwitch` to access EAGLContexts to prevent plugins from polluting Flutter's EAGLContext (#13314)" (flutter/engine#13753)
2019-11-08 ychris@google.com Always use `IOSGLContextSwitch` to access EAGLContexts to prevent plugins from polluting Flutter's EAGLContext (flutter/engine#13314)


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 garyq@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

-5f5713e3397164dd895c7ce33e3f8d1ba013784e
+af04338413c3ed73316350f64248a152433073b6