LaunchAppIndexAt  158 ash/accelerators/accelerator_controller.cc   Shelf::ForPrimaryDisplay()->LaunchAppIndexAt(n);
LaunchAppIndexAt  164 ash/accelerators/accelerator_controller.cc   Shelf::ForPrimaryDisplay()->LaunchAppIndexAt(-1);
LaunchAppIndexAt   96 ash/shelf/shelf.h   void LaunchAppIndexAt(int item_index);