RFR: 8201175: Move FilteringClosure::do_oop to genOopClosures.cpp

[Stefan Karlsson]

Hi all,

Please review this small change to move FilteringClosure::do_oop to 
genOopClosure.cpp.

http://cr.openjdk.java.net/~stefank/8201175/webrev.01
https://bugs.openjdk.java.net/browse/JDK-8201175

The FilteringClosure class is declared in genOopClosures.hpp and 
FilteringClosure::do_oop_work and FilteringClosure::do_oop_nv is located 
in genOopClosures.inline.hpp. So, moving FilteringClosure to 
genOopClosures.cpp shouldn't cause any surprises.

Thanks,
StefanK