kVersionStyleUnknown  159 gpu/config/gpu_control_list.cc   return (op_ != kUnknown && version_style_ != kVersionStyleUnknown);
kVersionStyleUnknown  172 gpu/config/gpu_control_list.cc   DCHECK(version_style != kVersionStyleUnknown);
kVersionStyleUnknown  196 gpu/config/gpu_control_list.cc   return kVersionStyleUnknown;