hg: jdk9/sandbox/jdk: 8055753: Use ConcurrentHashMap to map ProtectionDomain to PermissionCollection

[chris.hegarty at oracle.com]

Changeset: 72fdb709f356
Author:    mullan
Date:      2015-05-21 07:17 -0400
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/72fdb709f356

8055753: Use ConcurrentHashMap to map ProtectionDomain to PermissionCollection
Reviewed-by: weijun

! src/java.base/share/classes/java/security/ProtectionDomain.java