This reverts commit d4a73583.

https://dart.googlesource.com/sdk.git/+log/091e9f17809e..c4214e6daaac

2021-01-18 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-240.0.dev
2021-01-18 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-239.0.dev
2021-01-18 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-238.0.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:
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Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

https://dart.googlesource.com/sdk.git/+log/93a7e1189a8a..c962a50422d3

2021-01-16 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-234.0.dev
2021-01-16 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-233.0.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

https://dart.googlesource.com/sdk.git/+log/724d9e5e7d71..3629a798353d

2021-01-14 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-224.0.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

https://dart.googlesource.com/sdk.git/+log/7fcbd388b620..ef8bf7f0a667

2021-01-12 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-219.0.dev
2021-01-12 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-218.0.dev
2021-01-12 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-217.0.dev
2021-01-12 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-216.0.dev
2021-01-12 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-215.0.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

dart-lang/sdk@d7624b6ec7b (tag: 2.12.0-204.0.dev, origin/dev) Version 2.12.0-204.0.dev
dart-lang/sdk@b3bca1821c8 [VM/runtime] Decouple representation of function signatures from Function objects.

dart-lang/sdk@60175b98ac3 (tag: 2.12.0-203.0.dev) Version 2.12.0-203.0.dev
dart-lang/sdk@5c174c8d8c7 Remove unused data from AssistKind
dart-lang/sdk@28edda4e416 [vm] Propagate all errors when calling Dart code from hot reload stress testing
dart-lang/sdk@5ee1ee3c041 [dartdevc] Adding support for deferred library checks in DDC.
dart-lang/sdk@63795a73e6d bulk fix for unnecessary_null_in_if_null_operators
dart-lang/sdk@da6d850f5e0 (origin/base) Update to latest package:watcher
dart-lang/sdk@3f3fdc8d044 (tag: 2.12.0-202.0.dev) Version 2.12.0-202.0.dev
dart-lang/sdk@800ec511f52 [ DDS ] Add extension methods and getters for streams including event history
dart-lang/sdk@fa01efe614a (tag: 2.12.0-201.0.dev) Version 2.12.0-201.0.dev
dart-lang/sdk@47aebd910df Bump matcher dependency to latest version
dart-lang/sdk@3ee490327eb [VM] Adds @pragma('vm:notify-debugger-on-exception')
dart-lang/sdk@eb2cac730e2 [vm] Remove incorrectly added ASSERT
dart-lang/sdk@dd5b455a0c1 [dart2js] Handle super access in mixin declarations
dart-lang/sdk@5fac8d3d716 [CFE] Reproduction and fix of duplicate string-named 'abstract member-signature'
dart-lang/sdk@51674dea100 [vm/concurrency] Make static-const fields that are purely used by runtime operate on initial field table
dart-lang/sdk@8e293ceae76 Bump pub

https://dart.googlesource.com/sdk.git/+log/1f7dd915f40a..0e52b2abe517

2020-12-21 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-171.0.dev
2020-12-21 dart-luci-ci-builder@dart-ci.iam.gserviceaccount.com Version 2.12.0-170.0.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