set_age_mark     1305 src/heap.cc      new_space_.set_age_mark(new_space_.top());
set_age_mark     2955 src/mark-compact.cc   new_space->set_age_mark(new_space->top());
set_age_mark     1880 src/spaces.h     void set_age_mark(Address mark);
set_age_mark     2164 src/spaces.h     void set_age_mark(Address mark) { to_space_.set_age_mark(mark); }