Refactor results_option_build to return content instead of
setting the search results text. .html() is jQuery-only and has no
place in AbstractChosen.
Update results_build to use new content building function
Add a get_search_text method to the Prototype version

See d82d3445a1c48c70f83282b92f6dd67fe326254a
Use an abstracted function for setting search results content.

winnow_results needs to be able to update content and this will
contribute to moving it to AbstractChosen
Make update_results_content availabel in Prototype version
winnow_results is now framework independent. Move it to Abstract