Fix memory order and race bugs in Refbase.h & RefBase.cpp am: 70a46d674a am: bf3c130cde
am: def5fd4dfc

* commit 'def5fd4dfcfe39a2174237557545b97c8983a328':
  Fix memory order and race bugs in Refbase.h & RefBase.cpp

Change-Id: I7e827e236a62619137edfdbbd580bf05f37e1853