hg: jdk/sandbox: 8214363: HeapWord should not be a fake class

[chris.hegarty at oracle.com]

Changeset: 6fb43030a1b4
Author:    kbarrett
Date:      2019-02-18 16:34 -0500
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/6fb43030a1b4

8214363: HeapWord should not be a fake class
Summary: Change HeapWord and MetaWord to be pointers to incomplete types.
Reviewed-by: tschatzl, mikael, coleenp, pliden

! src/hotspot/share/gc/shared/genOopClosures.hpp
! src/hotspot/share/gc/shared/spaceDecorator.cpp
! src/hotspot/share/gc/shared/vmStructs_gc.hpp
! src/hotspot/share/gc/shenandoah/shenandoahMarkingContext.hpp
! src/hotspot/share/gc/shenandoah/shenandoahRuntime.hpp
! src/hotspot/share/memory/memRegion.hpp
! src/hotspot/share/memory/metaspace.hpp
! src/hotspot/share/utilities/globalDefinitions.hpp