https://dart.googlesource.com/sdk.git/+log/232308723704..cd8f712bcb01

git log 2323087..cd8f712 --date=short --first-parent --format='%ad %ae %s'
2020-03-25 kustermann@google.com [vm/compiler] Force members with @pragma('vm:entry-point') annotation to have boxed calling convention
2020-03-25 brianwilkerson@google.com Compute new relevances in LibraryPrefixConstributor
2020-03-25 mfairhurst@google.com Revert "Trim not useful bottoms off of the non/nullability stack traces"
2020-03-25 brianwilkerson@google.com Attempt to fix windows bot failure
2020-03-25 regis@google.com [VM/nnbd] Do not check nullability of LHS too early in strong mode (fixes flutter#41160).
2020-03-25 jwren@google.com Initial `dart run *` support and files.  I will follow up with additional tests and pubspec executable support.
2020-03-25 leafp@google.com Deprecate CastError.
2020-03-25 mfairhurst@google.com [nnbd_migration] Fix flutter#38462, remove @ for @required nullable params
2020-03-25 paulberry@google.com Migration: handle introduction of both `!` and `as` on a single expression.
2020-03-25 paulberry@google.com Sort declarations in fix_aggregator.dart
2020-03-25 paulberry@google.com Migration: add FixBuilder support for expression null check hints.
2020-03-25 paulberry@google.com Sort declarations in fix_builder.dart
2020-03-25 paulberry@google.com Migration: get rid of interfaces VariableRepository and VariableRecorder.
2020-03-25 paulberry@google.com Migration: better description text for edges.
2020-03-25 alexmarkov@google.com [vm/corelib/nnbd] Correct types in dart:convert and dart:io
2020-03-25 rnystrom@google.com Pretty up the CHANGELOG in anticipation of 2.8.0.
2020-03-25 brianwilkerson@google.com Add new relevance scores for NamedConstructorContributor
2020-03-25 alexmarkov@google.com [vm/nnbd] Fix CompileType::IsAssignableTo for nullable types in strong mode

Created with:
  gclient setdep -r src/third_party/dart@cd8f712bcb01

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/+/master/autoroll/README.md

Bug: None
Tbr: dart-vm-team@google.com