Add tests for constants from deferred loaded libraries being readable.

Add tests for constants from deferred loaded libraries being readable.

The spec says that the constant declarations accessed through a deferred prefix
are not compile time constant expressions, but they should still be accessible
as normal expressions.

R=sigurdm@google.com

Committed: https://code.google.com/p/dart/source/detail?r=44554

[Lasse Reichstein Nielsen, 2015-03-17 13:57:01]

lrn@google.com changed reviewers:
+ sigurdm@google.com

[sigurdm, 2015-03-17 14:09:02]

LGTM

[sigurdm, 2015-03-17 14:09:03]

LGTM

[sigurdm, 2015-03-17 14:09:59]

https://codereview.chromium.org/1014023002/diff/1/tests/language/language_dar...
File tests/language/language_dart2js.status (right):

https://codereview.chromium.org/1014023002/diff/1/tests/language/language_dar...
tests/language/language_dart2js.status:13: deferred_load_constants_test/none:
CompileTimeError
Should probably have an issue id

[Lasse Reichstein Nielsen, 2015-03-18 10:36:00]

Committed patchset #2 (id:20001) manually as 44554 (presubmit successful).