--- a/hotspot/src/share/vm/gc_interface/collectedHeap.hpp	Mon Mar 30 10:24:00 2015 -0400
+++ b/hotspot/src/share/vm/gc_interface/collectedHeap.hpp	Wed Apr 01 10:49:08 2015 +0200
@@ -185,8 +185,6 @@
 
  public:
   enum Name {
-    Abstract,
-    SharedHeap,
     GenCollectedHeap,
     ParallelScavengeHeap,
     G1CollectedHeap
@@ -196,7 +194,7 @@
     return _filler_array_max_size;
   }
 
-  virtual CollectedHeap::Name kind() const { return CollectedHeap::Abstract; }
+  virtual Name kind() const = 0;
 
   /**
    * Returns JNI error code JNI_ENOMEM if memory could not be allocated,