Roll src/third_party/skia 283ec65..8e083ee (32 commits) (flutter#13489)

https://skia.googlesource.com/skia.git/+log/283ec65f632a..8e083eee8ece

git log 283ec65..8e083ee --date=short --no-merges --format='%ad %ae %s'
2019-11-01 robertphillips@google.com Tighten up min and max vertex indices passed to GrTextureOp's meshes
2019-11-01 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-11-01 michaelludwig@google.com Progress towards consolidating aa mask and edge distances
2019-11-01 ethannicholas@google.com Revert "Implement sample mask and sample locations support in Vulkan"
2019-11-01 ethannicholas@google.com Implement sample mask and sample locations support in Vulkan
2019-11-01 kjlubick@google.com [canvaskit] Add relative SkPath operators
2019-11-01 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-11-01 robertphillips@google.com Revert "Reduce max # of AA Quads that can be merged or chained into a single GrTextureOp"
2019-11-01 borenet@google.com Revert "[recipes] Assert that Git is obtained from CIPD"
2019-11-01 senorblanco@chromium.org Dawn: update to recent texture proxy changes.
2019-11-01 borenet@google.com [recipes] Assert that Git is obtained from CIPD
2019-11-01 borenet@google.com [infra] Make CheckGeneratedFiles use git from CIPD
2019-11-01 mtklein@google.com opaque shaders and srcover -> src
2019-11-01 mtklein@google.com get rid of Uniforms
2019-11-01 michaelludwig@google.com Refactor tessellation metadata to move towards independent inset/outset calculations
2019-11-01 mtklein@google.com paint color -> shader
2019-11-01 mtklein@google.com paint alpha scaling as its own effect
2019-11-01 senorblanco@chromium.org Dawn: fix RTHeight adjustment.
2019-11-01 robertphillips@google.com Reduce max # of AA Quads that can be merged or chained into a single GrTextureOp
2019-11-01 halcanary@google.com tools/git-sync-deps: enforce commit hash in DEPS, not tags or branches
2019-11-01 egdaniel@google.com Use GrSurfaceProxyView for dst proxies.
2019-11-01 mtklein@google.com add --quick to fm
2019-11-01 michaelludwig@google.com Remove extraneous semicolons
2019-11-01 mtklein@google.com add GM for exercising interesting paths in SkVMBlitter
2019-11-01 mtklein@google.com try hashing shaders via their program
2019-11-01 brianosman@google.com Add BT2020 (non-constant-luminance) YUV color space
2019-11-01 brianosman@google.com Remove SK_LEGACY_YUV_MATRICES
2019-11-01 robertphillips@google.com Update GrTextureOp to use index buffer offsets for draws
2019-11-01 borenet@google.com [infra] Update git, make [Canvas|Path]Kit et al use git from CIPD
2019-11-01 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 841b016..e960392 (6 commits)
2019-11-01 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-11-01 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).

Created with:
  gclient setdep -r src/third_party/skia@8e083eee8ece

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 jcgregorio@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=jcgregorio@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': '283ec65f632a2f8afa93f1e92ba60449c3956569',
+  'skia_revision': '8e083eee8ece4e1acaeb01ae4192050969c4b0c6',
 
   # 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

@@ -1,4 +1,4 @@
-Signature: 508efaa3c6816230acc0e9cafe5c3472
+Signature: 77f23f792f731e0334254b8005795881
 
 UNUSED LICENSES:
 
@@ -3397,6 +3397,7 @@ FILE: ../../../third_party/skia/gm/postercircle.cpp
 FILE: ../../../third_party/skia/gm/samplelocations.cpp
 FILE: ../../../third_party/skia/gm/skbug_8664.cpp
 FILE: ../../../third_party/skia/gm/skbug_8955.cpp
+FILE: ../../../third_party/skia/gm/skvm.cpp
 FILE: ../../../third_party/skia/gm/video_decoder.cpp
 FILE: ../../../third_party/skia/include/core/SkTileMode.h
 FILE: ../../../third_party/skia/include/gpu/GrContextThreadSafeProxy.h