Roll src/third_party/skia 8ab6160c8149..d830fd98a4ef (3 commits) (#9836)

https://skia.googlesource.com/skia.git
/compare/8ab6160c8149..d830fd98a4ef

git log 8ab6160c8149da05eed6cf02cd1abcf5c0f6ddfd..d830fd98a4ef339d1182014851dc024710a67a36 --date=short --no-merges --format=%ad %ae %s
2019-07-15 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-07-16 egdaniel@google.com Revert "Pass GrColorType to the GrGpu::wrapRenderableBackendTexture chain of calls"
2019-07-16 egdaniel@google.com Revert "SkMetaData: move from src/ to tools/"

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 (nifong@google.com), and stop
the roller if necessary.

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': '8ab6160c8149da05eed6cf02cd1abcf5c0f6ddfd',
+  'skia_revision': 'd830fd98a4ef339d1182014851dc024710a67a36',
 
   # 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: 100b8357730bae61fd46db9e14652402
+Signature: 93572b8069a882cb1f19267146b437fb
 
 UNUSED LICENSES:
 
@@ -5369,6 +5369,8 @@ FILE: ../../../third_party/skia/src/shaders/SkShader.cpp
 FILE: ../../../third_party/skia/src/shaders/gradients/SkGradientShader.cpp
 FILE: ../../../third_party/skia/src/utils/SkBase64.cpp
 FILE: ../../../third_party/skia/src/utils/SkCamera.cpp
+FILE: ../../../third_party/skia/src/utils/SkMetaData.cpp
+FILE: ../../../third_party/skia/src/utils/SkMetaData.h
 FILE: ../../../third_party/skia/src/utils/SkParse.cpp
 FILE: ../../../third_party/skia/src/utils/SkParseColor.cpp
 FILE: ../../../third_party/skia/src/xml/SkDOM.cpp