hg: jdk/sandbox: 8209841: [REDO] Refactor G1ParallelCleaningTask into shared

[chris.hegarty at oracle.com]

Changeset: 9d01ad46daef
Author:    zgu
Date:      2018-08-24 15:49 -0400
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/9d01ad46daef

8209841: [REDO] Refactor G1ParallelCleaningTask into shared
Summary: Refactored ParallelCleaningTask to share with other GCs
Reviewed-by: tschatzl, shade

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