Roll Dart SDK from a188781c9fc8 to 26219fa05863 (1 revision) (flutter#22400)

https://dart.googlesource.com/sdk.git/+log/a188781c9fc8..26219fa05863

2020-11-09 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-29.0.dev

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dart-sdk-flutter-engine
Please CC dart-vm-team@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

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': 'a188781c9fc8ab950605716fb813bc5f2ca70e25',
+  'dart_revision': '26219fa05863420b5811ef509663ee13bc7432eb',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -47,10 +47,10 @@ vars = {
   'dart_http_retry_tag': '0.1.1',
   'dart_http_throttle_tag': '1.0.2',
   'dart_intl_tag': '0.17.0-nullsafety',
-  'dart_linter_tag': '0.1.123',
+  'dart_linter_tag': '0.1.124',
   'dart_oauth2_tag': '1.6.0',
   'dart_protobuf_rev': '3746c8fd3f2b0147623a8e3db89c3ff4330de760',
-  'dart_pub_rev': '4ca4767a6c00b2dadecdaee9a4866dae40ef25f2',
+  'dart_pub_rev': 'b10966c6a8ad7d95c2023b7842fa2697001d2fdf',
   'dart_pub_semver_tag': 'v1.4.4',
   'dart_resource_rev': '6b79867d0becf5395e5819a75720963b8298e9a7',
   'dart_root_certificates_rev': '7e5ec82c99677a2e5b95ce296c4d68b0d3378ed8',
@@ -59,7 +59,7 @@ vars = {
   'dart_shelf_static_rev': 'v0.2.8',
   'dart_shelf_web_socket_tag': '0.2.2+3',
   'dart_sse_tag': 'e5cf68975e8e87171a3dc297577aa073454a91dc',
-  'dart_stack_trace_tag': 'c9c867fa9d5b9c8a059e33d3efe759698aa49d60',
+  'dart_stack_trace_tag': '6788afc61875079b71b3d1c3e65aeaa6a25cbc2f',
   'dart_stagehand_tag': 'v3.3.9',
   'dart_stream_channel_tag': 'd7251e61253ec389ee6e045ee1042311bced8f1d',
   'dart_test_reflective_loader_tag': '0.1.9',
@@ -184,7 +184,7 @@ deps = {
    Var('dart_git') + '/collection.git' + '@' + Var('dart_collection_rev'),
 
   'src/third_party/dart/third_party/pkg/convert':
-   Var('dart_git') + '/convert.git@c1b01f832835d3d8a06b0b246a361c0eaab35d3c',
+   Var('dart_git') + '/convert.git@dd3bd28f63be7cb8ab961f38bc73229e4473b555',
 
   'src/third_party/dart/third_party/pkg/crypto':
    Var('dart_git') + '/crypto.git@f7c48b334b1386bc5ab0f706fbcd6df8496a87fc',

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: ad31226a4ca7a37ab610606d71887092
+Signature: d9eae89a1e78eeab48c3f2091544cca5
 
 UNUSED LICENSES: