Fix ResynthesizerResultProvider's handling of parts.

Fix ResynthesizerResultProvider's handling of parts.

When attempting to resynthesize a library containing parts from a
summary, ResynthesizerResultProvider needs to check whether an
analysis target comes from a summary by looking at the analysis
target's library source--this is different from AnalysisTarget.source
in the case of parts.

R=brianwilkerson@google.com

Committed: https://github.com/dart-lang/sdk/commit/21fb12105a6700d9b75ac3026833da7a9ef7cf3c

[Paul Berry, 2016-06-24 20:06:33]

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

[Brian Wilkerson, 2016-06-24 21:39:49]

lgtm

[Paul Berry, 2016-06-24 22:17:12]

Description was changed from

==========
Fix ResynthesizerResultProvider's handling of parts.

When attempting to resynthesize a library containing parts from a
summary, ResynthesizerResultProvider needs to check whether an
analysis target comes from a summary by looking at the analysis
target's library source--this is different from AnalysisTarget.source
in the case of parts.
==========

to

==========
Fix ResynthesizerResultProvider's handling of parts.

When attempting to resynthesize a library containing parts from a
summary, ResynthesizerResultProvider needs to check whether an
analysis target comes from a summary by looking at the analysis
target's library source--this is different from AnalysisTarget.source
in the case of parts.

R=brianwilkerson@google.com

Committed:
https://github.com/dart-lang/sdk/commit/21fb12105a6700d9b75ac3026833da7a9ef7cf3c
==========

[Paul Berry, 2016-06-24 22:17:13]

Committed patchset #1 (id:1) manually as
21fb12105a6700d9b75ac3026833da7a9ef7cf3c (presubmit successful).