RFR (S/M): 8142484: Let IHOP follow the current heap size, not the maximum heap size

[Thomas Schatzl]

Hi Bengt,

  new webrevs at
http://cr.openjdk.java.net/~tschatzl/8142484/webrev.0_to_1 (diff)
http://cr.openjdk.java.net/~tschatzl/8142484/webrev.1 (full)

The diff only contains some suggestions from Jon to reword the assert
messages.

Your suggestion is in the full webrev only.

Thanks,
  Thomas