Handle deferred access of unserialized code.

Handle deferred access of unserialized code.

This CL fixes crashes in deferred_load when using serialized dart:core:
- resolution impacts are cached in [Resolution] for both serialized and unserialized elements.
- type variable constants (for mirrors) are computed using [ConstantExpression]s.
- LibraryElementZ.getImportsFor returns the empty list; thus still not valid for deferred access in serialized code.

R=sigmund@google.com

Committed: https://github.com/dart-lang/sdk/commit/0b926d64a477e60ece9fa15099d0ec3caa05d217

[Johnni Winther, 2016-06-03 09:17:14]

johnniwinther@google.com changed reviewers:
+ het@google.com, sigmund@google.com

[Siggi Cherem (dart-lang), 2016-06-03 17:38:37]

lgtm

[Johnni Winther, 2016-06-06 08:26:42]

Description was changed from

==========
Handle deferred access of unserialized code.

This CL fixes crashes in deferred_load when using serialized dart:core:
- resolution impacts are cached in [Resolution] for both serialized and
unserialized elements.
- type variable constants (for mirrors) are computed using
[ConstantExpression]s.
- LibraryElementZ.getImportsFor returns the empty list; thus still not valid for
deferred access in serialized code.
==========

to

==========
Handle deferred access of unserialized code.

This CL fixes crashes in deferred_load when using serialized dart:core:
- resolution impacts are cached in [Resolution] for both serialized and
unserialized elements.
- type variable constants (for mirrors) are computed using
[ConstantExpression]s.
- LibraryElementZ.getImportsFor returns the empty list; thus still not valid for
deferred access in serialized code.

R=sigmund@google.com

Committed:
https://github.com/dart-lang/sdk/commit/0b926d64a477e60ece9fa15099d0ec3caa05d217
==========

[Johnni Winther, 2016-06-06 08:26:44]

Committed patchset #2 (id:20001) manually as
0b926d64a477e60ece9fa15099d0ec3caa05d217 (presubmit successful).