Roll Skia from 55ca4e692d8f to 9a6f3990aff7 (6 revisions) (#28105)

Author: skia-flutter-autoroll

DEPS

@@ -27,7 +27,7 @@ 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': '55ca4e692d8fa709e0a1b4d835461beddba8f194',
+  'skia_revision': '9a6f3990aff79e826e6c5b7c11c384e4ea19b89f',
 
   # 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: faea8b96fe7428a57a0dfb13ff71b672
+Signature: f1dd52ab83ce37340bbe5f8c4f35bb5e
 
 UNUSED LICENSES:
 
@@ -3006,6 +3006,8 @@ FILE: ../../../third_party/skia/src/sksl/SkSLOperators.cpp
 FILE: ../../../third_party/skia/src/sksl/SkSLOperators.h
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLBinaryExpression.cpp
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLBlock.cpp
+FILE: ../../../third_party/skia/src/sksl/ir/SkSLChildCall.cpp
+FILE: ../../../third_party/skia/src/sksl/ir/SkSLChildCall.h
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLConstructorArray.cpp
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLConstructorArray.h
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLConstructorArrayCast.cpp