Request for review (m) - 7054397

[Jon Masamitsu]

This change continues the templatization of the CMS freelist for
more general use and uses the freelists for Metaspace chunks
and block (part of the perm removal implementation).

http://cr.openjdk.java.net/~jmasa/7045397/webrev.00/

7045397: Add freelists to class loader arenas.

Continue the templatization of the CMS freelist for use with the
Metaspaces.

Split functionality of FreeList between a simplified
FreeList and AdaptiveFreeList.  AdaptiveFreeList is
specialized for use with CMS.

Replace an interim freelist of humongous chunks with a
freelist dictionary.  A linked list of humongous chunks had
been in use.

Fix some spellings (e.g., totalSize to total_size).

Delete the "splay" option that was never implemented.

Move classes Metablock and Metachunk to metaspace.hpp so they
are available for explicit instantiations of some template classes.