Roll Dart SDK from 498cfa57165b to 4b4c0325fd5b (2 revisions) (flutter/engine#41847)

https://dart.googlesource.com/sdk.git/+log/498cfa57165b..4b4c0325fd5b

2023-05-09 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.1.0-89.0.dev
2023-05-08 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.1.0-88.0.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 aam@google.com,dart-vm-team@google.com,jimgraham@google.com,rmistry@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter Engine: https://github.com/flutter/flutter/issues/new/choose

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/main/autoroll/README.md

DEPS

@@ -53,7 +53,7 @@ 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': '498cfa57165b2b1a4dc03b8f8841570d61911799',
+  'dart_revision': '4b4c0325fd5bc5b768f1f47b9f3125aa08d837fe',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -387,7 +387,7 @@ deps = {
    Var('dart_git') + '/html.git@5d87dc8a0638b9f494e7044dc78bd4520341ab6d',
 
   'src/third_party/dart/third_party/pkg/http':
-   Var('dart_git') + '/http.git@f581ff79c3ce68429ad791470201c66167e7655b',
+   Var('dart_git') + '/http.git@61dcb9108d92f9e5e3ca61384c46b7a3045fa530',
 
   'src/third_party/dart/third_party/pkg/http_multi_server':
    Var('dart_git') + '/http_multi_server.git@e0b5d357890eb09f0a7b3d26ddf643dee6977c4b',
@@ -465,7 +465,7 @@ deps = {
    Var('dart_git') + '/term_glyph.git@b1105016d7b178d27032ec112af53227e1e5e50b',
 
   'src/third_party/dart/third_party/pkg/test':
-   Var('dart_git') + '/test.git@9484592acc10f52efccdce03df73229fa2b10509',
+   Var('dart_git') + '/test.git@1d65501b31ee368e7f683ccc96fd9f1a5492a4e6',
 
   'src/third_party/dart/third_party/pkg/test_reflective_loader':
    Var('dart_git') + '/test_reflective_loader.git@d1b763f6281a46a48e1da6f0a6e8152e3480e8d2',