hg: jdk10/hs/hotspot: 8180325: Use ClassLoaderData::classes_do for CDS classes

[coleen.phillimore at oracle.com]

Changeset: 5f99ef96e357
Author:    coleenp
Date:      2017-05-16 19:36 -0400
URL:       http://hg.openjdk.java.net/jdk10/hs/hotspot/rev/5f99ef96e357

8180325: Use ClassLoaderData::classes_do for CDS classes
Summary: Use closures and ClassLoaderData::classes_do instead of SystemDictionary::classes_do
Reviewed-by: iklam, jiangli

! src/share/vm/classfile/classLoaderData.cpp
! src/share/vm/memory/metaspaceShared.cpp
! src/share/vm/memory/metaspaceShared.hpp
! src/share/vm/oops/instanceKlass.cpp