Revert Dart to 2.19.0-431.0.dev (#37934)

* Revert "Roll Dart SDK from 4851720b30d2 to 3ed1fc1c344d (1 revision) (#37920)"

This reverts commit 08995ff5f9666718cc29a85bdda73bd8a4d7fc6d.

* Revert "Roll Dart SDK from ae4b643d2a4b to 4851720b30d2 (1 revision) (#37914)"

This reverts commit e7ac37c4ad52c806588b3c8310f41a855b0a938a.

* Revert "Roll Dart SDK from eb65e5cd48e9 to ae4b643d2a4b (1 revision) (#37910)"

This reverts commit 9f3abd84218723b81ec8de9f529ec8502304ee49.

* Revert "Roll Dart SDK from ae7042bf53ff to eb65e5cd48e9 (1 revision) (#37909)"

This reverts commit 15b385e3245ae236ebac732710a8510a031fd6ab.
diff --git a/DEPS b/DEPS
index fb83ab7..d5e3ee3 100644
--- a/DEPS
+++ b/DEPS
@@ -48,7 +48,7 @@
   # 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': '3ed1fc1c344dbe8d5ac6424a4237833d81f1b556',
+  'dart_revision': 'ae7042bf53ffda8492a80c3851c70dfadd497f69',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -60,10 +60,10 @@
   'dart_collection_rev': 'efd709fc1760a595f8575f4137a1847de1b49d76',
   'dart_devtools_rev': '23444af89d716818f099974df3e4fffac87fd886',
   'dart_protobuf_rev': 'ae90e53cd690edbfc72fa6c293fdb7b4a09ee0a2',
-  'dart_pub_rev': '6fdcdd4357645817e7d7027ee2157ed68ef69c53',
+  'dart_pub_rev': '6ac42d7644dedfcc500147ab47886eecab4b1b38',
   'dart_root_certificates_rev': '692f6d6488af68e0121317a9c2c9eb393eb0ee50',
   'dart_watcher_rev': '32591071a83f632478e702f67e29de6e54428ce9',
-  'dart_webdev_rev': '637b406f325669507b5c1048c19a7c0083c1bd6e',
+  'dart_webdev_rev': '3ec168f6815af9d5f11278111d147bc82c0755c3',
   'dart_webkit_inspection_protocol_rev': 'ddb624cd85954dd384056cc253a8fc2b9da5364d',
   'dart_yaml_edit_rev': '299f74594ff9fda412c1da5c0b5d5231d0c6fc42',
   'dart_zlib_rev': '27c2f474b71d0d20764f86f60ef8b00da1a16cda',
diff --git a/ci/licenses_golden/licenses_third_party b/ci/licenses_golden/licenses_third_party
index c2a3240..472ed3b 100644
--- a/ci/licenses_golden/licenses_third_party
+++ b/ci/licenses_golden/licenses_third_party
@@ -1,4 +1,4 @@
-Signature: 641a5cb5bd5c140d8580bfbf4ca6f046
+Signature: 25df2f5233d08470c12a5689f24999cf
 
 UNUSED LICENSES: