RFR (S): JDK-8076076: Move SharedHeap::print_size_transition() into G1 code

[Bengt Rutisson]

Hi everyone,

One more step towards eventually getting rid of SharedHeap.

Could I have a couple of reviews for this small change:

http://cr.openjdk.java.net/~brutisso/8076076/webrev.00/

https://bugs.openjdk.java.net/browse/JDK-8076076

The method SharedHeap::print_size_transition() is only used by G1 but 
was placed in SharedHeap. It was called from the G1CollectorPolicy 
class, so I moved it to be next to the other related methods 
(G1CollectorPolicy::print_heap_transition() and 
G1CollectorPolicy::print_detailed_heap_transition()). I also renamed it 
to print_heap_transition() to be more consistent with the other two 
methods. Some simplifications to the parameter list could be made now 
that it is an internal G1 method.

Thanks,
Bengt