Roll src/third_party/dart e4c39721c473..0299903f3e78 (31 commits) (flutter#16553)

Author: skia-flutter-autoroll

DEPS

@@ -34,7 +34,7 @@ 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': 'e4c39721c4730a046b8d1c100a54118655808493',
+  'dart_revision': '0299903f3e78ab6eb1d7d5ed1a70a039b3646913',
 
   # 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 +56,6 @@ vars = {
   'dart_fixnum_tag': '0.10.9',
   'dart_glob_tag': '1.1.7',
   'dart_html_tag': '0.14.0+1',
-  'dart_http_multi_server_tag': '2.0.5',
   'dart_http_parser_tag': '3.1.3',
   'dart_http_retry_tag': '0.1.1',
   'dart_http_tag': '0.12.0+2',
@@ -246,7 +245,7 @@ deps = {
    Var('dart_git') + '/http.git' + '@' + Var('dart_http_tag'),
 
   'src/third_party/dart/third_party/pkg/http_multi_server':
-   Var('dart_git') + '/http_multi_server.git' + '@' + Var('dart_http_multi_server_tag'),
+   Var('dart_git') + '/http_multi_server.git@ea269f79321d659208402088f3297e8920a88ee6',
 
   'src/third_party/dart/third_party/pkg/http_parser':
    Var('dart_git') + '/http_parser.git' + '@' + Var('dart_http_parser_tag'),

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: 28030680e72e1c9f7c1005f9db0327a9
+Signature: 9e91dddf4ebf6fd65156da23b57e1556
 
 UNUSED LICENSES:
 
@@ -7474,6 +7474,7 @@ FILE: ../../../third_party/dart/sdk/lib/html/html_common/conversions_dart2js.dar
 FILE: ../../../third_party/dart/sdk/lib/html/html_common/html_common.dart
 FILE: ../../../third_party/dart/sdk/lib/libraries.json
 FILE: ../../../third_party/dart/sdk/lib/vmservice_libraries.json
+FILE: ../../../third_party/dart/sdk_nnbd/lib/dart2js_migration_libraries.json
 FILE: ../../../third_party/dart/sdk_nnbd/lib/html/html_common/conversions_dart2js.dart
 FILE: ../../../third_party/dart/sdk_nnbd/lib/html/html_common/html_common.dart
 FILE: ../../../third_party/dart/sdk_nnbd/lib/libraries.json