hg: jdk/submit: 8212025: Remove collector_present variable from ThreadHeapSampler

[jcbeyler at google.com]

Changeset: b13740aa47c0
Author:    jcbeyler
Date:      2018-10-10 13:12 -0700
URL:       http://hg.openjdk.java.net/jdk/submit/rev/b13740aa47c0

8212025: Remove collector_present variable from ThreadHeapSampler
Summary:
Reviewed-by:

! src/hotspot/share/runtime/threadHeapSampler.hpp