hg: jdk9/hs-gc/hotspot: 8074319: barrier_set_cast defined via friend injection

[jesper.wilhelmsson at oracle.com]

Changeset: a3654e0e77f9
Author:    jwilhelm
Date:      2015-03-04 02:23 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-gc/hotspot/rev/a3654e0e77f9

8074319: barrier_set_cast defined via friend injection
Summary: Changed the in-class definition to a friend declaration and move the definition to namespace scope
Reviewed-by: jwilhelm, simonis
Contributed-by: kim.barrett at oracle.com

! src/share/vm/memory/barrierSet.hpp