Roll Dart SDK from 7546e99f8a50 to d46987001f76 (1 revision) (flutter/engine#42274)

https://dart.googlesource.com/sdk.git/+log/7546e99f8a50..d46987001f76

2023-05-23 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.1.0-140.0.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 bdero@google.com,dart-vm-team@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': '7546e99f8a50347c3cc49ef382212a2bf53d038b',
+  'dart_revision': 'd46987001f768cf667c77e1ee57a8dae2547a22e',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -68,7 +68,7 @@ vars = {
   'dart_perfetto_rev': 'b8da07095979310818f0efde2ef3c69ea70d62c5',
   'dart_protobuf_gn_rev': 'ca669f79945418f6229e4fef89b666b2a88cbb10',
   'dart_protobuf_rev': '038872bc66a28ecde1c3522e3c1f3f601b6fc6f7',
-  'dart_pub_rev': 'a3f8b2fd36ec432450caf907474a02023ef3e44e',
+  'dart_pub_rev': '078c7fea0be2656debc675646806da14fa94f853',
   'dart_root_certificates_rev': '692f6d6488af68e0121317a9c2c9eb393eb0ee50',
   'dart_watcher_rev': '1584936edc33f74a5ffe39108d4f547ad35faacd',
   'dart_webdev_rev': '2b2ae0e833c66a5756aba64a4a5d2bbdfbd4ec76',