Function cef_time_to_doublet 

pub unsafe extern "C" fn cef_time_to_doublet(
    cef_time: *const cef_time_t,
    time: *mut f64,
) -> c_int

Converts cef_time_t to/from a double which is the number of seconds since epoch (Jan 1, 1970). Webkit uses this format to represent time. A value of 0 means “not initialized”. Returns true (1) on success and false (0) on failure.