hg: jdk/submit: JDK-8206467: Refactor G1ParallelCleaningTask into shared

[zgu at redhat.com]

Changeset: 2db3f19f2f46
Author:    zgu
Date:      2018-08-18 15:18 -0400
URL:       http://hg.openjdk.java.net/jdk/submit/rev/2db3f19f2f46

JDK-8206467: Refactor G1ParallelCleaningTask into shared

! src/hotspot/share/gc/g1/g1CollectedHeap.cpp
+ src/hotspot/share/gc/shared/parallelCleaning.cpp
+ src/hotspot/share/gc/shared/parallelCleaning.hpp