For what I understand of Ubuntu themes and the Unity bar, the application source-code (and not the packaging script) has to be altered to comply with the requested.
SQL Developer is both a Java application and proprietary by Oracle. Though this may be requested to Oracle, most likely it won't be implemented, since SQL Developer not only isn't Ubuntu specific but it isn't even Linux specific.
For what I understand of Ubuntu themes and the Unity bar, the application source-code (and not the packaging script) has to be altered to comply with the requested.
SQL Developer is both a Java application and proprietary by Oracle. Though this may be requested to Oracle, most likely it won't be implemented, since SQL Developer not only isn't Ubuntu specific but it isn't even Linux specific.
Regards.