Roll src/third_party/skia c33e6dcc700b..36477b49c2ef (8 commits) (#8552)

https://skia.googlesource.com/skia.git/%2Blog/c33e6dcc700b..36477b49c2ef

git log c33e6dcc700bae9a1bbcbc9ebc32709a1c0d5c21..36477b49c2ef4c4dc23f8c53df4d51d141407ba8 --date=short --no-merges --format=%ad %ae %s
2019-04-11 jvanverth@google.com Fix GrFillRRectOp rendering in Metal.
2019-04-11 mtklein@google.com rewrite new SkVx unit test
2019-04-11 mtklein@google.com clean up SK_SUPPORT_LEGACY_A8_MASKBLITTER
2019-04-11 mtklein@google.com simplify and centralize SK_API
2019-04-10 lsalzman@mozilla.com limit mask drawing to clip bounds
2019-04-11 mtklein@google.com add SkVx helpers for working with unorm8
2019-04-10 herb@google.com Change getMetrics to the final API prepareForDrawing
2019-04-11 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff (egdaniel@google.com), and stop
the roller if necessary.

DEPS

@@ -23,7 +23,7 @@ vars = {
   'fuchsia_git': 'https://fuchsia.googlesource.com',
   'github_git': 'https://github.com',
   'skia_git': 'https://skia.googlesource.com',
-  'skia_revision': 'c33e6dcc700bae9a1bbcbc9ebc32709a1c0d5c21',
+  'skia_revision': '36477b49c2ef4c4dc23f8c53df4d51d141407ba8',
 
   # 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: d8912b05ae5ac462d5b7a163eb36768f
+Signature: c7c3f4acec439edec1b7b44324cca267
 
 UNUSED LICENSES:
 
@@ -5971,6 +5971,7 @@ FILE: ../../../third_party/skia/gm/overdrawcanvas.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/include/core/SkApi.h
 FILE: ../../../third_party/skia/include/core/SkTileMode.h
 FILE: ../../../third_party/skia/include/gpu/GrContextThreadSafeProxy.h
 FILE: ../../../third_party/skia/include/private/GrContext_Base.h