[co19] Roll co19 to 01adc3471b81d3bceb9bbe775ed1262b1b89cc8a
[co19] Roll co19 to 01adc3471b81d3bceb9bbe775ed1262b1b89cc8a

2020-10-02 irina.arkhipets@gmail.com Fixes 946: LanguageFeatures/Instantiate-to-bounds/typedef/static tests updated according to the recent SDK changes.
2020-10-02 irina.arkhipets@gmail.com Issue 946: LanguageFeatures/Instantiate-to-bounds/typeef/static/typedef_FutureOr tests updated according to the recent changes.
2020-10-01 irina.arkhipets@gmail.com Fixes 945: LanguageFeatures/Instantiate-to-bounds/class/static tests updated according to the recent changes.
2020-10-01 sgrekhov@unipro.ru Fixes 943. For nullable types explicitly cast initializer expression as nullable
2020-09-30 irina.arkhipets@gmail.com Fixes 607: LanhuageFeatures/Instantiate-to-bounds tests updated.

Change-Id: I701ab4f452a0900a036d5713062503219ef687a0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/165762
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