Verify that required param constants are accessible outside the declaring lib (#26440).

Verify that required param constants are accessible outside the declaring lib (#26440).

A test to verify that `required` "details" are accessible in reporting errors found outside of the declaring library.

Follows up on Brian's fix: https://github.com/dart-lang/sdk/commit/23b02bc35112ebb955e006b87b3fbe03c5e071d7.

More context: https://github.com/dart-lang/sdk/issues/26440.

BUG=
R=brianwilkerson@google.com

Committed: https://github.com/dart-lang/sdk/commit/e1fad5cddbbf23cf3c6c4592d76e0654171f0f3a

[pquitslund, 2016-05-13 21:11:13]

pquitslund@google.com changed reviewers:
+ brianwilkerson@google.com

[Brian Wilkerson, 2016-05-13 21:30:25]

lgtm

[pquitslund, 2016-05-13 21:31:45]

Description was changed from

==========
Verify that required param constants are accessible outside the declaring lib
(#26440).

A test to verify that `required` "details" are accessible in reporting errors
found outside of the declaring library.

Follows up on Brian's fix:
https://github.com/dart-lang/sdk/commit/23b02bc35112ebb955e006b87b3fbe03c5e071d7.

More context: https://github.com/dart-lang/sdk/issues/26440.

BUG=
==========

to

==========
Verify that required param constants are accessible outside the declaring lib
(#26440).

A test to verify that `required` "details" are accessible in reporting errors
found outside of the declaring library.

Follows up on Brian's fix:
https://github.com/dart-lang/sdk/commit/23b02bc35112ebb955e006b87b3fbe03c5e071d7.

More context: https://github.com/dart-lang/sdk/issues/26440.

BUG=
R=brianwilkerson@google.com

Committed:
https://github.com/dart-lang/sdk/commit/e1fad5cddbbf23cf3c6c4592d76e0654171f0f3a
==========

[pquitslund, 2016-05-13 21:31:46]

Committed patchset #1 (id:1) manually as
e1fad5cddbbf23cf3c6c4592d76e0654171f0f3a (presubmit successful).