hg: jdk/sandbox: 8220444: Shenandoah should use parallel version of WeakProcessor in root processor for weak roots

[chris.hegarty at oracle.com]

Changeset: be40860e8227
Author:    zgu
Date:      2019-03-11 14:06 -0400
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/be40860e8227

8220444: Shenandoah should use parallel version of WeakProcessor in root processor for weak roots
Reviewed-by: rkennke, shade

! src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.cpp
! src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.hpp