Roll Dart SDK from d60cfe5b356f to 9e1c05a8dbb6 (3 revisions) (#20392)

DEPS

@@ -34,7 +34,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': 'd60cfe5b356f782ea874a09034c9e6e1802b0d2d',
+  'dart_revision': '9e1c05a8dbb60bc484d06c856c78a1be3f183db8',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -231,7 +231,7 @@ deps = {
    Var('dart_git') + '/intl.git' + '@' + Var('dart_intl_tag'),
 
   'src/third_party/dart/third_party/pkg/json_rpc_2':
-   Var('dart_git') + '/json_rpc_2.git@d589e635d8ccb7cda6a804bd571f88abbabab146',
+   Var('dart_git') + '/json_rpc_2.git@413ee9d1d1841c23ebfd2248abc4fc950e0d6946',
 
   'src/third_party/dart/third_party/pkg/linter':
    Var('dart_git') + '/linter.git' + '@' + Var('dart_linter_tag'),

ci/licenses_golden/licenses_third_party

-Signature: 3c7ccf0ef2eb71e1bae57c50cd60559a
+Signature: 1bc91d4ab57c501ec0f63304947e487b
 
 UNUSED LICENSES:
 
@@ -8360,7 +8360,7 @@ FILE: ../../../third_party/dart/runtime/bin/exe_utils.cc
 FILE: ../../../third_party/dart/runtime/bin/exe_utils.h
 FILE: ../../../third_party/dart/runtime/bin/platform_macos.h
 FILE: ../../../third_party/dart/runtime/bin/platform_macos_test.cc
-FILE: ../../../third_party/dart/runtime/include/dart_api_dl.cc
+FILE: ../../../third_party/dart/runtime/include/dart_api_dl.c
 FILE: ../../../third_party/dart/runtime/include/dart_api_dl.h
 FILE: ../../../third_party/dart/runtime/include/dart_version.h
 FILE: ../../../third_party/dart/runtime/include/internal/dart_api_dl_impl.h