hg: jdk/sandbox: 8242448: Change HeapRegionManager::guarantee_contiguous_range to be assert_contiguous_range

[chris.hegarty at oracle.com]

Changeset: 1c7f617f8866
Author:    sjohanss
Date:      2020-04-14 15:18 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/1c7f617f8866

8242448: Change HeapRegionManager::guarantee_contiguous_range to be assert_contiguous_range
Reviewed-by: tschatzl, kbarrett

! src/hotspot/share/gc/g1/heapRegionManager.cpp
! src/hotspot/share/gc/g1/heapRegionManager.hpp