Roll Dart SDK from 89cd39c6eee4 to c0c5298d3629 (1 revision) (#23973)

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': '89cd39c6eee43006adfeddb816474bf36243b20c',
+  'dart_revision': 'c0c5298d3629442f134a7d51b8e54c39adf77e8f',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -209,7 +209,7 @@ deps = {
    Var('dart_git') + '/html.git@7f31979303f916f2aabb9e2091950798abdd9ca1',
 
   'src/third_party/dart/third_party/pkg/http':
-   Var('dart_git') + '/http.git@3845753a54624b070828cb3eff7a6c2a4e046cfb',
+   Var('dart_git') + '/http.git@d5c678cd63c3e9c1d779a09acfa95b7e3af84665',
 
   'src/third_party/dart/third_party/pkg/http_multi_server':
    Var('dart_git') + '/http_multi_server.git@e8c8be7f15b4fb50757ff5bf29766721fbe24fe4',

ci/licenses_golden/licenses_third_party

-Signature: 632d52821cb6ba3f7f339a749a8be362
+Signature: c4d820af1702c39f3f4f29789327f83f
 
 UNUSED LICENSES: