Reverts "Manual roll of Dart. (#54983)"

DEPS

@@ -56,7 +56,7 @@ vars = {
   # 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': '0f783bdb7a4d7b73187fe5d2971eb98149235c80',
+  'dart_revision': '1a6246225b75aae44a5cba2b98ee6d55ecfc89b6',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -72,7 +72,7 @@ vars = {
   'dart_protobuf_gn_rev': 'ca669f79945418f6229e4fef89b666b2a88cbb10',
   'dart_protobuf_rev': 'ccf104dbc36929c0f8708285d5f3a8fae206343e',
   'dart_pub_rev': '31fa75baa5872e7f094a554c0ec7741742889530',
-  'dart_tools_rev': 'b98c535537101eff0484ba279bd4090a5b9ac2ad',
+  'dart_tools_rev': '5b15f8b60bf950a2f06dad3258dee61c153fdb44',
   'dart_watcher_rev': '0484625589d8512b36a7ad898a6cc6351d24c556',
   'dart_web_rev': '4996dc2acd30ff06f7e500ec76fde8a66db82c0c',
   'dart_webdev_rev': '75417c09181c97786d9539a662834bed9d2f1e77',
@@ -202,6 +202,7 @@ vars = {
   "upstream_logging": "https://github.com/dart-lang/logging.git",
   "upstream_markdown": "https://github.com/dart-lang/markdown.git",
   "upstream_matcher": "https://github.com/dart-lang/matcher.git",
+  "upstream_mime": "https://github.com/dart-lang/mime.git",
   "upstream_mockito": "https://github.com/dart-lang/mockito.git",
   "upstream_ocmock": "https://github.com/erikdoe/ocmock.git",
   "upstream_package_config": "https://github.com/dart-lang/package_config.git",
@@ -221,6 +222,7 @@ vars = {
   "upstream_shaderc": "https://github.com/google/shaderc.git",
   "upstream_shelf": "https://github.com/dart-lang/shelf.git",
   "upstream_skia": "https://skia.googlesource.com/skia.git",
+  "upstream_source_map_stack_trace": "https://github.com/dart-lang/source_map_stack_trace.git",
   "upstream_source_maps": "https://github.com/dart-lang/source_maps.git",
   "upstream_source_span": "https://github.com/dart-lang/source_span.git",
   "upstream_sqlite": "https://github.com/sqlite/sqlite.git",
@@ -428,6 +430,9 @@ deps = {
   'src/flutter/third_party/dart/third_party/pkg/matcher':
    Var('dart_git') + '/matcher.git@d6d573d0f8d65b36550ce62aad3ce6b5e987b642',
 
+  'src/flutter/third_party/dart/third_party/pkg/mime':
+   Var('dart_git') + '/mime.git@11fec7d6df509a4efd554051cc27e3bf82df9c96',
+
   'src/flutter/third_party/dart/third_party/pkg/mockito':
    Var('dart_git') + '/mockito.git@eb4d1daa20c105c94ac29689c1975f0850fa18f2',
 
@@ -455,6 +460,9 @@ deps = {
   'src/flutter/third_party/dart/third_party/pkg/shelf':
    Var('dart_git') + '/shelf.git@9f2dffecbe8f219146a077e401758602752d486a',
 
+  'src/flutter/third_party/dart/third_party/pkg/source_map_stack_trace':
+   Var('dart_git') + '/source_map_stack_trace.git@741b6ceb4b6cdb8ff620664337d7ecc63ca52cc1',
+
   'src/flutter/third_party/dart/third_party/pkg/source_maps':
    Var('dart_git') + '/source_maps.git@5f82c613664ade03c7a6d0e6c59687c69dec894b',
 

ci/licenses_golden/licenses_dart

@@ -1,4 +1,4 @@
-Signature: 0d1eb1503a6d5425fca3b40d86a66cfb
+Signature: 2b488f1b7fc93b69b4f89d69211da628
 
 ====================================================================================================
 LIBRARY: dart
@@ -4785,7 +4785,7 @@ Exhibit B - "Incompatible With Secondary Licenses" Notice
   This Source Code Form is "Incompatible With Secondary Licenses", as
   defined by the Mozilla Public License, v. 2.0.
 
-You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/0f783bdb7a4d7b73187fe5d2971eb98149235c80
+You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/1a6246225b75aae44a5cba2b98ee6d55ecfc89b6
 /third_party/fallback_root_certificates/
 
 ====================================================================================================

pubspec.yaml

@@ -235,7 +235,7 @@ dependency_overrides:
   metrics_center:
     path: ./third_party/pkg/flutter_packages/packages/metrics_center
   mime:
-    path: ./third_party/dart/third_party/pkg/tools/pkgs/mime
+    path: ./third_party/dart/third_party/pkg/mime
   node_preamble:
     path: ./third_party/pkg/node_preamble
   package_config:
@@ -267,7 +267,7 @@ dependency_overrides:
   smith:
     path: ./third_party/dart/pkg/smith
   source_map_stack_trace:
-    path: ./third_party/dart/third_party/pkg/tools/pkgs/source_map_stack_trace
+    path: ./third_party/dart/third_party/pkg/source_map_stack_trace
   source_maps:
     path: ./third_party/dart/third_party/pkg/source_maps
   source_span:

sky/packages/sky_engine/LICENSE

@@ -32054,7 +32054,7 @@ Exhibit B - "Incompatible With Secondary Licenses" Notice
   This Source Code Form is "Incompatible With Secondary Licenses", as
   defined by the Mozilla Public License, v. 2.0.
 
-You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/0f783bdb7a4d7b73187fe5d2971eb98149235c80
+You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/1a6246225b75aae44a5cba2b98ee6d55ecfc89b6
 /third_party/fallback_root_certificates/
 
 --------------------------------------------------------------------------------