Add dart options for override annotations.

Add dart options for override annotations.

These make it possible to tag generated getters, setters, clearX()
and hasX() methods with "@override".

R=skybrian@google.com

Committed: https://github.com/dart-lang/dart-protoc-plugin/commit/18ab9c733b940f2c5bead7491821e9751da8972b

[frederikmutzel, 2016-07-15 12:53:28]

Description was changed from

==========
Add dart options for override annotations.

These make it possible to tag generated getters, setters, clearX()
and hasX() methods with "@override".
==========

to

==========
Add dart options for override annotations.

These make it possible to tag generated getters, setters, clearX()
and hasX() methods with "@override".
==========

[frederikmutzel, 2016-07-15 12:53:29]

frederikmutzel@google.com changed reviewers:
+ skybrian@google.com

[skybrian, 2016-07-19 06:15:52]

LGTM

I did not have time to land this today but I will do it tomorrow.

[skybrian, 2016-07-19 18:19:56]

Description was changed from

==========
Add dart options for override annotations.

These make it possible to tag generated getters, setters, clearX()
and hasX() methods with "@override".
==========

to

==========
Add dart options for override annotations.

These make it possible to tag generated getters, setters, clearX()
and hasX() methods with "@override".

R=skybrian@google.com

Committed:
https://github.com/dart-lang/dart-protoc-plugin/commit/18ab9c733b940f2c5bead7...
==========

[skybrian, 2016-07-19 18:19:58]

Committed patchset #1 (id:1) manually as
18ab9c733b940f2c5bead7491821e9751da8972b (presubmit successful).