Revert Dart SDK to b8f4018 (#26037)

* Revert "Roll Dart SDK from 094c902 to 2ea89ef (1 revision) (#26030)"

This reverts commit 0d62a56.

* Revert "Roll Dart SDK from 04e55da to 094c902 (1 revision) (#26027)"

This reverts commit 06cbf1e.

* Revert "Roll Dart SDK from b4210cc to 04e55da (2 revisions) (#26020)"

This reverts commit d1a1182.

* Revert "Roll Dart SDK from 86c7493 to b4210cc (2 revisions) (#26006)"

This reverts commit 3ffb8ef.

* Revert "Roll Dart SDK from b8f4018 to 86c7493 (16 revisions) (#25999)"

This reverts commit a712ffe.

Author: zanderso

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': '2ea89ef8f6de01860980ff31feffe8d56a60b4f2',
+  'dart_revision': 'b8f4018535fa792891e2add3a475f35e3ec156ab',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -51,7 +51,7 @@ vars = {
   'dart_resource_rev': '6b79867d0becf5395e5819a75720963b8298e9a7',
   'dart_root_certificates_rev': '7e5ec82c99677a2e5b95ce296c4d68b0d3378ed8',
   'dart_shelf_proxy_tag': 'v1.0.0',
-  'dart_shelf_static_rev': 'b8e51372332a27a4939466d94a22f15be53ac3e4',
+  'dart_shelf_static_rev': 'fa30419055279a00c9e428439b1abe362d18f25d',
   'dart_sse_tag': '5da8fedcdc56f306933d202e2d204753eecefd36',
   'dart_stack_trace_tag': '6788afc61875079b71b3d1c3e65aeaa6a25cbc2f',
   'dart_stream_channel_tag': 'd7251e61253ec389ee6e045ee1042311bced8f1d',
@@ -154,7 +154,7 @@ deps = {
    Var('dart_git') + '/args.git@d8fea36c10ef96797be02e3d132d572445cd86f4',
 
   'src/third_party/dart/third_party/pkg/async':
-   Var('dart_git') + '/async.git@49464c342fe64c8632223ce3475364d163fb0623',
+   Var('dart_git') + '/async.git@cde00b89bd3c19e877b21de2c02282d4d311d0a5',
 
   'src/third_party/dart/third_party/pkg/bazel_worker':
    Var('dart_git') + '/bazel_worker.git@0885637b037979afbf5bcd05fd748b309fd669c0',
@@ -166,7 +166,7 @@ deps = {
    Var('dart_git') + '/charcode.git@bcd8a12c315b7a83390e4865ad847ecd9344cba2',
 
   'src/third_party/dart/third_party/pkg/cli_util':
-   Var('dart_git') + '/cli_util.git@8a73cd7eca373ff71d290ccf47d4829e5ca44209',
+   Var('dart_git') + '/cli_util.git@fd1b716e8a350a454e01ae56df540293d31ff6c8',
 
   'src/third_party/dart/third_party/pkg/clock':
    Var('dart_git') + '/clock.git' + '@' + Var('dart_clock_rev'),
@@ -223,7 +223,7 @@ deps = {
    Var('dart_git') + '/intl.git' + '@' + Var('dart_intl_tag'),
 
   'src/third_party/dart/third_party/pkg/json_rpc_2':
-   Var('dart_git') + '/json_rpc_2.git@7e00f893440a72de0637970325e4ea44bd1e8c8e',
+   Var('dart_git') + '/json_rpc_2.git@5ec32a2e0e99dedcef5b3237f93167cd22c2da50',
 
   'src/third_party/dart/third_party/pkg/linter':
    Var('dart_git') + '/linter.git' + '@' + Var('dart_linter_tag'),
@@ -268,7 +268,7 @@ deps = {
    Var('dart_git') + '/resource.git' + '@' + Var('dart_resource_rev'),
 
   'src/third_party/dart/third_party/pkg/shelf':
-   Var('dart_git') + '/shelf.git@c511f06e6d2d28ffe905a45eea1da761b95ea0ca',
+   Var('dart_git') + '/shelf.git@4b9294e29eb308709444a5c0b890fa8ccd69fae4',
 
   'src/third_party/dart/third_party/pkg/shelf_packages_handler':
    Var('dart_git') + '/shelf_packages_handler.git@78302e67c035047e6348e692b0c1182131f0fe35',
@@ -334,7 +334,7 @@ deps = {
    Var('dart_git') + '/package_config.git@a84c0d45401f215fbe9384df923a38f4022a3c45',
 
   'src/third_party/dart/tools/sdks':
-   {'packages': [{'version': 'version:2.13.0-211.14.beta', 'package': 'dart/dart-sdk/${{platform}}'}], 'dep_type': 'cipd'},
+   {'packages': [{'version': 'version:2.12.0', 'package': 'dart/dart-sdk/${{platform}}'}], 'dep_type': 'cipd'},
 
   # WARNING: end of dart dependencies list that is cleaned up automatically - see create_updated_flutter_deps.py.
 

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: ef8dea0096af85cf7a7112d581c768cc
+Signature: 0cd97bc3f34ac40583de63d2f282fdba
 
 UNUSED LICENSES: