src/core/ref-count-base.h
2009-11-12 replace RefCountBase with SimpleRefCount<> to avoid duplicate refcounting implementations.
2008-07-08 avoid uneeded inline
2008-07-08 add RefCountBase::GetReferenceCount.
2008-07-08 coding style
2008-04-10 add copy constructor and assignment operator to ensure proper initialization of refcount.
2008-03-27 bug: 147. Add RefCountBase