Roll Dart SDK from b330d8bd7b69 to 58f4fe1787dd (1 revision) (#20689)

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': 'b330d8bd7b69ef35e11e8500158c01fb26d5f4f7',
+  'dart_revision': '58f4fe1787ddaf1c26df6c59cc88ef4861596c81',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py

ci/licenses_golden/licenses_third_party

-Signature: 00efa64a22b3ce9ad58311846e38c643
+Signature: 38863032ba3009c976bcdb825546c12b
 
 UNUSED LICENSES: