Roll Dart SDK from 54c79f559d23 to 3dc08e6ea29d (1 revision) (#27092)

DEPS

@@ -35,7 +35,7 @@ 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': '54c79f559d232e65e4110e69f3c862e9592e90de',
+  'dart_revision': '3dc08e6ea29d6c59afeaf843720ffe8cd2b2cb4f',
 
   # 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: fac1e66d172b489af0254ce479804b38
+Signature: fd56aa40f3bd2db93a0944745f721969
 
 UNUSED LICENSES: