Roll src/third_party/dart 529f614eb381..34bf6742d4e9 (10 commits) (#18446)

diff --git a/DEPS b/DEPS
index aa29a78..f61fdfb 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': '529f614eb381a8477ac1945907fafc07c8aa9c31',
+  'dart_revision': '34bf6742d4e9bdaa9945787717581829ebbe717e',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
diff --git a/ci/licenses_golden/licenses_third_party b/ci/licenses_golden/licenses_third_party
index 2b0d07d..b4bc01a 100644
--- a/ci/licenses_golden/licenses_third_party
+++ b/ci/licenses_golden/licenses_third_party
@@ -1,4 +1,4 @@
-Signature: 218291b784f8d7067e092c68933337f3
+Signature: f2d21caf475bab55e167543adc4e93b8
 
 UNUSED LICENSES: