Make summary builder classes implement summary interfaces.

Make summary builder classes implement summary interfaces.

This allows for easier unit testing, since we can use a builder class
directly rather than having to serialize and deserialize it.

R=scheglov@google.com

Committed: https://github.com/dart-lang/sdk/commit/c1642e9d9f57be18300416abe9d0f9c3c01a0e08

[Paul Berry, 2016-01-13 16:34:10]

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

[scheglov, 2016-01-13 16:39:33]

LGTM

[Paul Berry, 2016-01-13 16:54:52]

Description was changed from

==========
Make summary builder classes implement summary interfaces.

This allows for easier unit testing, since we can use a builder class
directly rather than having to serialize and deserialize it.
==========

to

==========
Make summary builder classes implement summary interfaces.

This allows for easier unit testing, since we can use a builder class
directly rather than having to serialize and deserialize it.

R=scheglov@google.com

Committed:
https://github.com/dart-lang/sdk/commit/c1642e9d9f57be18300416abe9d0f9c3c01a0e08
==========

[Paul Berry, 2016-01-13 16:54:53]

Committed patchset #1 (id:1) manually as
c1642e9d9f57be18300416abe9d0f9c3c01a0e08 (presubmit successful).