Roll src/third_party/skia 4e11526e3d7e..1dfc77cc08ee (9 commits) (#13183)

https://skia.googlesource.com/skia.git/+log/4e11526e3d7e..1dfc77cc08ee

git log 4e11526e3d7e..1dfc77cc08ee --date=short --no-merges --format='%ad %ae %s'
2019-10-16 robertphillips@google.com Add unit test to exercise GrTextureFreed message handling after a context abandon
2019-10-16 herb@google.com Introduce SkGlyphSourceBuffer
2019-10-16 robertphillips@google.com Work around un-safe downcast in PromiseLazyInstantiateCallback destructor after a context abandon
2019-10-16 mtklein@google.com remove ternary min/max
2019-10-16 halcanary@google.com CanvasKit: Switch to WebGL 2.0
2019-10-16 brianosman@google.com Starting to hack up HDR transfer function support
2019-10-16 mtklein@google.com add used_in_loop bit to skvm::Builder::Instruction
2019-10-16 halcanary@google.com [minor] SkGlyphRunList public before private
2019-10-16 mtklein@google.com Reland "mark which SkVM tests should JIT or not"

Created with:
  gclient setdep -r src/third_party/skia@1dfc77cc08ee

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 csmartdalton@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=csmartdalton@google.com

DEPS

@@ -26,7 +26,7 @@ vars = {
   'skia_git': 'https://skia.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '4e11526e3d7e2b22126b6a9b95b15ff86469b4be',
+  'skia_revision': '1dfc77cc08ee3d3b86c7d1a58b2d5d835d4ad695',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

ci/licenses_golden/licenses_skia

-Signature: 11029def5ed106ee5f588614aaf50597
+Signature: 7b9f51b17d981ee2a75edc251ac8f4e7
 
 UNUSED LICENSES: