* Migrate to python3; drop python support.
* Update Windows toolchain support.
* Remove some unused methods.
* Python 2.7 is still needed on Windows.
* Update gsutil to a version that supports python3.
Fixes: https://github.com/dart-lang/sdk/issues/28793
TEST=Manually tested common user journeys.
Change-Id: I663a22b237a548bb82dc2e601e399e3bc3649211
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/192182
Reviewed-by: William Hesse <whesse@google.com>
Reviewed-by: Alexander Aprelev <aam@google.com>
browser-compat-data includes info on elements as both part of the
Web API and the individual tagged elements. The scripts would default
to whatever was processed last instead of trying to unify any conflicts
that may come up with the different sources of truth. This CL addresses
that issue by choosing the "stricter" of the two versions.
Change-Id: Id3437c14276faf8af3fe41d7a6eb83defc9bd0b0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/155844
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>