Roll Dart SDK from 56fa1c638f3d to 6e43eba8b51e (1 revision) (flutter#29312)

Author: skia-flutter-autoroll

DEPS

@@ -39,7 +39,7 @@ 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': '56fa1c638f3d7dc8d9dafcc747183fb4c076e726',
+  'dart_revision': '6e43eba8b51edb4f0afb25215bc56846028d38be',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -52,7 +52,7 @@ vars = {
   'dart_intl_tag': '0.17.0-nullsafety',
   'dart_linter_tag': '1.14.0',
   'dart_protobuf_rev': 'c1eb6cb51af39ccbaa1a8e19349546586a5c8e31',
-  'dart_pub_rev': '400f21e9883ce6555b66d3ef82f0b732ba9b9fc8',
+  'dart_pub_rev': '489a7a0b91966c7547da4f3761a9810f09caffb6',
   'dart_root_certificates_rev': '692f6d6488af68e0121317a9c2c9eb393eb0ee50',
   'dart_shelf_proxy_tag': 'v1.0.0',
   'dart_shelf_static_rev': '202ec1a53c9a830c17cf3b718d089cf7eba568ad',

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: 969a6a5d563ba1df50cb7c7ba4171e5d
+Signature: e03f501b6a44afc98ade1ba547669ea5
 
 UNUSED LICENSES: