Roll Skia from 99a797d497fe to 638bfdc9e23c (4 revisions)

https://skia.googlesource.com/skia.git/+log/99a797d497fe..638bfdc9e23c

2023-02-08 [email protected] [graphite] BufferManager methods to allocate unmapped buffers
2023-02-08 [email protected] Add support for FieldAccess expressions on temporaries.
2023-02-08 [email protected] Add support for struct constructors.
2023-02-08 [email protected] Add support for FieldAccess expressions that can be lvalues.

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 [email protected],[email protected],[email protected],[email protected] on the revert to ensure that a human
is aware of the problem.

To file a bug in Skia: https://bugs.chromium.org/p/skia/issues/entry
To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

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/+doc/main/autoroll/README.md

Author: skia-flutter-autoroll

DEPS

@@ -18,7 +18,7 @@ vars = {
   'llvm_git': 'https://llvm.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '99a797d497fe983e63f3fbfe064c270973298b45',
+  'skia_revision': '638bfdc9e23c3f26f9c0da493a33a769a555ce60',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 85fb289d823a27b54c7e6306b81392c3
+Signature: 159968979d9ff1b417b6d1760a9c2441
 
 ====================================================================================================
 LIBRARY: etc1