Roll Dart SDK from 639cf51f4472 to 1d0b890287a4 (1 revision) (#50129)

https://dart.googlesource.com/sdk.git/+log/639cf51f4472..1d0b890287a4

2024-01-28 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.4.0-85.0.dev

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dart-sdk-flutter-engine
Please CC dart-vm-team@google.com,jacksongardner@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter Engine: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
diff --git a/DEPS b/DEPS
index 20ef850..857938e 100644
--- a/DEPS
+++ b/DEPS
@@ -64,7 +64,7 @@
   # Dart is: https://github.com/dart-lang/sdk/blob/main/DEPS
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': '639cf51f4472e4f86c5308e442b89b0a6a74347a',
+  'dart_revision': '1d0b890287a482713ce97a9a60d39727c4e9176b',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py