Introduce experimental flag --reify in the vm.

Introduce experimental flag --reify in the vm.
Note that many tests will fail when using --no-reify, since expected type errors
are not reported.

R=iposva@google.com

Committed: https://github.com/dart-lang/sdk/commit/699890db11b3dfc515fd5dc1e7b94aca5432cd18

[regis, 2015-12-11 23:16:02]

regis@google.com changed reviewers:
+ iposva@google.com

[regis, 2016-02-29 23:05:30]

Description was changed from

==========
Introduce experimental flag --reify in the vm.
We would need to make fingerprints insensitive to the flag value in order to
commit this change.
==========

to

==========
Introduce experimental flag --reify in the vm.
Note that many tests will fail when using --no-reify, since expected type errors
are not reported.
==========

[regis, 2016-02-29 23:08:38]

This can now be submitted after source fingerprints have been made insensitive
to types (see https://codereview.chromium.org/1752503002/)

[Ivan Posva, 2016-03-01 18:00:16]

LGTM -ip

[regis, 2016-03-01 18:03:22]

Description was changed from

==========
Introduce experimental flag --reify in the vm.
Note that many tests will fail when using --no-reify, since expected type errors
are not reported.
==========

to

==========
Introduce experimental flag --reify in the vm.
Note that many tests will fail when using --no-reify, since expected type errors
are not reported.

R=iposva@google.com

Committed:
https://github.com/dart-lang/sdk/commit/699890db11b3dfc515fd5dc1e7b94aca5432cd18
==========

[regis, 2016-03-01 18:03:24]

Committed patchset #5 (id:80001) manually as
699890db11b3dfc515fd5dc1e7b94aca5432cd18 (presubmit successful).