Merge "Revert "Revert "Move back to the previous version of ion.h.""" am:...
Merge "Revert "Revert "Move back to the previous version of ion.h.""" am: 5dde3e4d am: 74828960 am: f422c366 am: c164e988
am: a0fdff3f
Change-Id: Id6c35843107b80e1aa75d43c97cb12548ddcd0c5