Add more features to the summary linker.

Add more features to the summary linker.

We now detect constant cycles involving:

- Named constructors.

- Generic classes.  (Note: we don't track the type arguments of
  generic classes yet, because that's unnecessary for detecting
  constant constructor cycles).

- References to top level constant variables and constant fields.

- Final fields in constant classes.

- Implicit calls to "super".

Also, we properly handle constants that refer to fields of an enum
class.

R=scheglov@google.com

Committed: https://github.com/dart-lang/sdk/commit/fbeff9c9041f581c7de9c25246d1f001fc7fb983

[Paul Berry, 2016-03-28 17:12:43]

paulberry@google.com changed reviewers:
+ jmesserly@google.com, scheglov@google.com

[scheglov, 2016-03-28 17:33:08]

LGTM

[Paul Berry, 2016-03-28 17:39:40]

Description was changed from

==========
Add more features to the summary linker.

We now detect constant cycles involving:

- Named constructors.

- Generic classes.  (Note: we don't track the type arguments of
  generic classes yet, because that's unnecessary for detecting
  constant constructor cycles).

- References to top level constant variables and constant fields.

- Final fields in constant classes.

- Implicit calls to "super".

Also, we properly handle constants that refer to fields of an enum
class.
==========

to

==========
Add more features to the summary linker.

We now detect constant cycles involving:

- Named constructors.

- Generic classes.  (Note: we don't track the type arguments of
  generic classes yet, because that's unnecessary for detecting
  constant constructor cycles).

- References to top level constant variables and constant fields.

- Final fields in constant classes.

- Implicit calls to "super".

Also, we properly handle constants that refer to fields of an enum
class.

R=scheglov@google.com

Committed:
https://github.com/dart-lang/sdk/commit/fbeff9c9041f581c7de9c25246d1f001fc7fb983
==========

[Paul Berry, 2016-03-28 17:39:41]

Committed patchset #1 (id:1) manually as
fbeff9c9041f581c7de9c25246d1f001fc7fb983 (presubmit successful).