File	Line Coverage			Functions
const_singleton.h	100%	100%	4 / 4	99.1%	112 / 113
manager_impl.cc	100%	100%	16 / 16	100%	1 / 1
manager_impl.h	100%	100%	1 / 1	100%	1 / 1
threadsafe_singleton.h	100%	100%	39 / 39	100%	33 / 33