[8u60] RFR backport of 8060025: Object copy time regressions after JDK-8031323 and JDK-8057536

[Thomas Schatzl]

Hi all,

  can I have reviews for the backport of "8060025: Object copy time
regressions after JDK-8031323 and JDK-8057536" for 8u60?

It did only apply with minor changes, so I need re-reviews. The problem
has been that in jdk9 isHumongous() (and friends) have been renamed to
is_humongous() in g1CollectedHeap.cpp.

Full 8u60 changeset:
http://cr.openjdk.java.net/~tschatzl/8060025-8u60/webrev.8u60/
Diff changest:
http://cr.openjdk.java.net/~tschatzl/8060025-8u60/webrev.8u60-fix/

CR:
https://bugs.openjdk.java.net/browse/JDK-8060025

Original change:
http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/5cdbde3a9a57

Testing: jprt

Thanks,
  Thomas