[co19] Roll co19 to 9934d8540d097366287267519413e888a7f6a482
[co19] Roll co19 to 9934d8540d097366287267519413e888a7f6a482

2020-03-31 sgrekhov@unipro.ru Fixes 5479. NNBD assignability tests added
2020-03-31 sgrekhov@unipro.ru Fixes 594. NNBD expression typing tests added
2020-03-31 sgrekhov@unipro.ru 595. Change  error expectation strings for analyzer and CFE
2020-03-30 sgrekhov@unipro.ru 466. Right nullable subtyping tests added
2020-03-30 sgrekhov@unipro.ru Fixes 589. Change syntax of the static warning expectation
2020-03-27 sgrekhov@unipro.ru 466. Right promoted variable subtyping tests added
2020-03-26 sgrekhov@unipro.ru 466. Left nulable subtyping tests added
2020-03-26 sgrekhov@unipro.ru Fixes 549. Change  expectaton of two errors on the same line to the correct one
2020-03-26 sgrekhov@unipro.ru 466. Right legacy subtyping tests added
2020-03-26 sgrekhov@unipro.ru Fix for 540. fromEnvironment() tests simplified
2020-03-25 sgrekhov@unipro.ru Fix for 540. Missed 'const' added
2020-03-25 sgrekhov@unipro.ru Fix for 540. Change default values of int.fromEnvironment() and String.fromEnvironment()
2020-03-25 sgrekhov@unipro.ru Fix for 585. Make fromEnvironment tests to be independed from defaultValue
2020-03-25 sgrekhov@unipro.ru Fix for 542. Change expected result of the parse
2020-03-25 sgrekhov@unipro.ru Issue numbers added
2020-03-25 sgrekhov@unipro.ru Fixes 588. Expect failures on fields instead of constructors
2020-03-25 irina.arkhipets@gmail.com Fixed issue 591: useless static-warning tags removed.

Change-Id: If150f5b985f27037737cdb77be51a262605fb2d4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/141887
Reviewed-by: William Hesse <a821cddceae7dc400f272e3cb1a72f400f9fed6d@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk