RFR 8208399: Metadata methods print_(value_)on_maybe_null() compare 'this' to NULL

[Harold David Seigel]

Hi,

Please review this JDK-12 fix for bug JDK-8208399.  The fix changes 
function print_value_on_maybe_null() into a static function to avoid 
comparisons between 'this' and NULL.  It also deletes unused methods 
print_maybe_null() and print_on_maybe_null().

Open Webrev: 
http://cr.openjdk.java.net/~hseigel/bug_8208399/webrev/index.html

JBS Bug:  https://bugs.openjdk.java.net/browse/JDK-8208399

This fix was regression tested by running Mach5 tiers 1 and 2 tests and 
builds on Linux-X64, Windows, Solaris Sparc, and Mac OS X, running tiers 
3-5 tests on Linux-x64, and by running JCK-11 Lang and VM tests on 
Linux-x64.

Thanks, Harold