hg: zgc/zgc: ZGC: Concurrent weak processing cleanups

[per.liden at oracle.com]

Changeset: 0c797f001d31
Author:    pliden
Date:      2018-01-24 13:35 +0100
URL:       http://hg.openjdk.java.net/zgc/zgc/rev/0c797f001d31

ZGC: Concurrent weak processing cleanups

! src/hotspot/share/gc/z/zDriver.cpp
! src/hotspot/share/gc/z/zHeap.cpp
! src/hotspot/share/gc/z/zHeap.hpp
! src/hotspot/share/gc/z/zOopClosures.hpp
! src/hotspot/share/gc/z/zOopClosures.inline.hpp
! src/hotspot/share/gc/z/zRootsIterator.cpp
! src/hotspot/share/gc/z/zRootsIterator.hpp
! src/hotspot/share/gc/z/zStat.cpp
! src/hotspot/share/gc/z/zWeakRootsProcessor.cpp
! src/hotspot/share/gc/z/zWeakRootsProcessor.hpp
! src/hotspot/share/runtime/globals.hpp