Roll Dart SDK from e59935669cb0 to f745f9447ddf (1 revision) (#21014)

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': 'e59935669cb040e1a25d74763c80f18b5c0a8c2a',
+  'dart_revision': 'f745f9447ddfef003c18d08fe81a0fce231908a0',
 
   # 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: bc7af689ab5666b73c11d00c10554c85
+Signature: ca13ac62f4b38884492d2fa947e83fdd
 
 UNUSED LICENSES: