RFR (S): 8066566: Refactor ParNewGeneration to contain ParNewTracer

[Kim Barrett]

On Dec 10, 2014, at 9:51 AM, Marcus Larsson <marcus.larsson at oracle.com> wrote:
> 
> Hi again,
> 
> Updated the patch with some cleanups to use 'const ParNewTracer*' rather than 'ParNewTracer&' where appropriate.

Why “pointer to const” rather than “reference to const”, e.g. use “const ParNewTracer&” instead.  That would be much more usual C++ style.