Add assertion on addImplementationBuilder.

Add assertion on addImplementationBuilder.

R=karlklose@google.com

Committed: https://github.com/dart-lang/sdk/commit/368d1ec58af35f61938f62d2be81d310a6c4c430

[ahe, 2017-03-31 15:31:23]

ahe@google.com changed reviewers:
+ karlklose@google.com

[karlklose, 2017-04-03 06:48:14]

LGTM

https://codereview.chromium.org/2788923002/diff/1/pkg/front_end/lib/src/fasta...
File pkg/front_end/lib/src/fasta/source/source_library_builder.dart (right):

https://codereview.chromium.org/2788923002/diff/1/pkg/front_end/lib/src/fasta...
pkg/front_end/lib/src/fasta/source/source_library_builder.dart:73: bool
canAddImplementationBuilders = false;
Could you add a comment here and/or to addImplementationBuilder describing when
they can be added.

[ahe, 2017-04-04 09:46:44]

Thank you, Karl!

https://codereview.chromium.org/2788923002/diff/1/pkg/front_end/lib/src/fasta...
File pkg/front_end/lib/src/fasta/source/source_library_builder.dart (right):

https://codereview.chromium.org/2788923002/diff/1/pkg/front_end/lib/src/fasta...
pkg/front_end/lib/src/fasta/source/source_library_builder.dart:73: bool
canAddImplementationBuilders = false;
On 2017/04/03 06:48:14, karlklose wrote:
> Could you add a comment here and/or to addImplementationBuilder describing
when
> they can be added.

Done.

[ahe, 2017-04-04 13:43:44]

Description was changed from

==========
Add assertion on addImplementationBuilder.
==========

to

==========
Add assertion on addImplementationBuilder.

R=karlklose@google.com

Committed:
https://github.com/dart-lang/sdk/commit/368d1ec58af35f61938f62d2be81d310a6c4c430
==========

[ahe, 2017-04-04 13:43:45]

Committed patchset #2 (id:20001) manually as
368d1ec58af35f61938f62d2be81d310a6c4c430 (presubmit successful).