Fix summary generation in "package-summary-only" mode.

Fix summary generation in "package-summary-only" mode.

If we aren't doing full analysis, then we can't use
`context.librarySources` to find out the set of library sources (because
it doesn't include sources that haven't been examined yet).  Instead, we
have to query each source to find out its type.

R=scheglov@google.com

Committed: https://github.com/dart-lang/sdk/commit/c497c026fef3b48cd1c2649b15c1029d7fab793c

[Paul Berry, 2016-03-08 18:10:19]

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

[scheglov, 2016-03-08 18:25:24]

LGTM

[Paul Berry, 2016-03-08 20:14:15]

Description was changed from

==========
Fix summary generation in "package-summary-only" mode.

If we aren't doing full analysis, then we can't use
`context.librarySources` to find out the set of library sources (because
it doesn't include sources that haven't been examined yet).  Instead, we
have to query each source to find out its type.
==========

to

==========
Fix summary generation in "package-summary-only" mode.

If we aren't doing full analysis, then we can't use
`context.librarySources` to find out the set of library sources (because
it doesn't include sources that haven't been examined yet).  Instead, we
have to query each source to find out its type.

R=scheglov@google.com

Committed:
https://github.com/dart-lang/sdk/commit/c497c026fef3b48cd1c2649b15c1029d7fab793c
==========

[Paul Berry, 2016-03-08 20:14:16]

Committed patchset #1 (id:1) manually as
c497c026fef3b48cd1c2649b15c1029d7fab793c (presubmit successful).