Roll src/third_party/skia 3a543aafd4e6..c853bf2867b9 (4 commits) (#10665)

https://skia.googlesource.com/skia.git/+log/3a543aafd4e6..c853bf2867b9

git log 3a543aafd4e6..c853bf2867b9 --date=short --no-merges --format='%ad %ae %s'
2019-08-06 mtklein@google.com build programs lazily in SkVMBlitter
2019-08-06 egdaniel@google.com Update some gpu caps isFormatRenderable calls.
2019-08-06 halcanary@google.com experimental/editor: interface no longer uses stringslice
2019-08-06 robertphillips@google.com Use GrComputeTightCombinedBufferSize in GrMtlGpu::uploadToTexture

Created with:
  gclient setdep -r src/third_party/skia@c853bf2867b9

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, who should
be CC'd on the roll, and stop the roller if necessary.


Bug: None
TBR=reed@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': '3a543aafd4e68af182ef88572086c094cd63f0b2',
+  'skia_revision': 'c853bf2867b939d8f9c35aa7302bfa2581a0b21b',
 
   # 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: 91907a2f838fb5ca018107c354659f0e
+Signature: 2384f9d6f56bfc0a42feb759dfa47d78
 
 UNUSED LICENSES:
 
@@ -4685,6 +4685,7 @@ FILE: ../../../third_party/skia/experimental/editor/run_handler.cpp
 FILE: ../../../third_party/skia/experimental/editor/run_handler.h
 FILE: ../../../third_party/skia/experimental/editor/stringslice.cpp
 FILE: ../../../third_party/skia/experimental/editor/stringslice.h
+FILE: ../../../third_party/skia/experimental/editor/stringview.h
 FILE: ../../../third_party/skia/experimental/editor/word_boundaries.cpp
 FILE: ../../../third_party/skia/experimental/editor/word_boundaries.h
 FILE: ../../../third_party/skia/experimental/xform/SkShape.cpp