Roll Dart SDK from f78bd85cda0c (#24518)

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': 'fc5e80cbdc6f695bedd4fd5f77f9ee511386b4ca',
+  'dart_revision': 'f78bd85cda0cbc699121d6ceb66637267c53a1f4',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -56,7 +56,7 @@ vars = {
   'dart_shelf_packages_handler_tag': '2.0.0',
   'dart_shelf_proxy_tag': '0.1.0+7',
   'dart_shelf_static_rev': '779a6e99b320ce9ed4ff6b88bd0cdc40ea5c62c4',
-  'dart_sse_tag': '17b52bbdeee53fc54e5bdf9b80934460a9d63ba6',
+  'dart_sse_tag': '8add37c0ec0419ce28153a03f299d44ce006a975',
   'dart_stack_trace_tag': '6788afc61875079b71b3d1c3e65aeaa6a25cbc2f',
   'dart_stream_channel_tag': 'd7251e61253ec389ee6e045ee1042311bced8f1d',
   'dart_typed_data_tag': 'f94fc57b8e8c0e4fe4ff6cfd8290b94af52d3719',
@@ -155,7 +155,7 @@ deps = {
   # WARNING: Unused Dart dependencies in the list below till "WARNING:" marker are removed automatically - see create_updated_flutter_deps.py.
 
   'src/third_party/dart/third_party/pkg/args':
-   Var('dart_git') + '/args.git@c3c7fd4ae728d03cd43e723f11d099b07045ad01',
+   Var('dart_git') + '/args.git@5f5082b7fcc41595d95d7ba002e8f51f352b3b4f',
 
   'src/third_party/dart/third_party/pkg/async':
    Var('dart_git') + '/async.git@376d418b1b535030fbe3369938d2ffdbb0340a77',
@@ -332,7 +332,7 @@ deps = {
    Var('dart_git') + '/watcher.git' + '@' + Var('dart_watcher_rev'),
 
   'src/third_party/dart/third_party/pkg/web_socket_channel':
-   Var('dart_git') + '/web_socket_channel.git@680358915e331fda823908234f80beba1ed4ec83',
+   Var('dart_git') + '/web_socket_channel.git@76931ea1b81ba71e8319330c35285d3e88566315',
 
   'src/third_party/dart/third_party/pkg/yaml':
    Var('dart_git') + '/yaml.git@2392d113b0104dd19358f2833a282f19e2d67c01',

ci/licenses_golden/licenses_third_party

-Signature: c1d818194c1c8e2a0c95950b41e06218
+Signature: 578ba07cf2cc82d751f9b071299b1590
 
 UNUSED LICENSES: