In 451eaab718 the "--supermixin" flag was
removed from the VM and from the shared language tests. This caused
those language tests to fail on analyzer (because analyzer still
requires the flag).
Also some tests that validated the non-supermixin behavior were deleted.
It looks like we are going to keep requiring the flag in analyzer until
the feature is implemented in dart2js (see
https://github.com/dart-lang/sdk/issues/24478#issuecomment-170054303).
So in order to ensure that the analyzer implementation continues to be
tested, we still need the flags in the tests. We also need the old
tests that validate the non-supermixin behavior, since the analyzer
continues to implement that behavior when the "--supermixin" flag is
absent.
This CL does not introduce any new VM failures, because (a) the VM
ignores the "--supermixin" flag, so the tests in which the flag is being
reintroduced will still behave the same way on the VM, and (b) the tests
that validate non-supermixin behavior are disabled on the VM.
R=brianwilkerson@google.com, regis@google.com
Review URL: https://codereview.chromium.org/1635763003 .
