Roll src/third_party/dart 518f09726660..092ed38a87e9 (3 commits) (#18259)

diff --git a/DEPS b/DEPS
index 4410901..38a407f 100644
--- a/DEPS
+++ b/DEPS
@@ -34,7 +34,7 @@
   # 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': '518f097266606c35fd192617839d0dc8590a8671',
+  'dart_revision': '092ed38a87e9536f43c6a35aed057c137e45113a',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py