When a style specifies trough_under_steppes, ScrollbarThemeGtk should inflate the track rect when painting as well as queue repaints of the track when repainting the stepper buttons.
Created attachment 65666 [details] Patch for this issue
Comment on attachment 65666 [details] Patch for this issue OK. Might be worth mentioning any theme that needs this fix for future reference.
Comment on attachment 65666 [details] Patch for this issue Clearing flags on attachment: 65666 Committed r66285: <http://trac.webkit.org/changeset/66285>
All reviewed patches have been landed. Closing bug.