Roll src/third_party/skia 8619a34bb875..d978b90d205d (17 commits) (#7736)

https://skia.googlesource.com/skia.git/%2Blog/8619a34bb875..d978b90d205d

git log 8619a34bb87565dfcfc3818ceab065e93ea183e6..d978b90d205d76206e9d15cd8c4db8743350e023 --date=short --no-merges --format=%ad %ae %s
2019-02-07 bsalomon@google.com Track separate texure binding states for each OpenGL texture target.
2019-01-18 halcanary@google.com SkQP: new tool: tools/skqp/find_commit_with_best_gold_results
2019-02-07 brianosman@google.com Check for single owner and abandoned context in createMipMapProxyFromBitmap
2019-02-07 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2019-02-07 jvanverth@google.com Fix Metal bots.
2019-02-07 halcanary@google.com SkQP: update tools/skqp/gn_to_bp.py, add release script
2019-02-07 bsalomon@google.com Cache CPU memory buffers used for client side arrays.
2019-02-07 bungeman@google.com Don't include .cpp file in SampleCCPRGeometry.cpp
2019-02-07 brianosman@google.com Give ImGui the correct DeltaTime
2019-01-30 djsollen@google.com Remove colorspace restrictions for 565/FP16 configs in Android Codec.
2019-02-07 mtklein@google.com skvx wip
2019-02-07 bsalomon@google.com Default init GrGpuResource::UniqueID to invalid id.
2019-02-07 robertphillips@google.com Move "matches" from GrContextThreadSafeProxy to GrContext_Base
2019-02-07 robertphillips@google.com Make room for shifting GrContext to GrDirectContext
2019-02-07 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2019-02-07 brianosman@google.com Support building mips when creating cross context images
2019-02-07 bsalomon@google.com Pin the quad index buffer in GrResourceProvider.

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 (fmalita@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': '8619a34bb87565dfcfc3818ceab065e93ea183e6',
+  'skia_revision': 'd978b90d205d76206e9d15cd8c4db8743350e023',
 
   # 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: 4429bc6b2c346cb26cff0ef1e4042cf7
+Signature: ac5c698899bb2b83190448b35b3c66d7
 
 UNUSED LICENSES:
 
@@ -1174,9 +1174,9 @@ FILE: ../../../third_party/skia/src/gpu/GrContextThreadSafeProxyPriv.h
 FILE: ../../../third_party/skia/src/gpu/GrDDLContext.cpp
 FILE: ../../../third_party/skia/src/gpu/GrDeinstantiateProxyTracker.cpp
 FILE: ../../../third_party/skia/src/gpu/GrDeinstantiateProxyTracker.h
-FILE: ../../../third_party/skia/src/gpu/GrDirectContext.cpp
 FILE: ../../../third_party/skia/src/gpu/GrDriverBugWorkarounds.cpp
 FILE: ../../../third_party/skia/src/gpu/GrFPArgs.h
+FILE: ../../../third_party/skia/src/gpu/GrLegacyDirectContext.cpp
 FILE: ../../../third_party/skia/src/gpu/GrProxyProvider.cpp
 FILE: ../../../third_party/skia/src/gpu/GrProxyProvider.h
 FILE: ../../../third_party/skia/src/gpu/GrQuad.cpp