ReturnType        656 base/bind_internal.h   typedef R ReturnType;
ReturnType        661 base/bind_internal.h   typedef R ReturnType;
ReturnType        667 base/bind_internal.h   typedef R ReturnType;
ReturnType        674 base/bind_internal.h   typedef R ReturnType;
ReturnType        682 base/bind_internal.h   typedef R ReturnType;
ReturnType        692 base/bind_internal.h   typedef R ReturnType;
ReturnType        703 base/bind_internal.h   typedef R ReturnType;
ReturnType        715 base/bind_internal.h   typedef R ReturnType;