--- a/hotspot/src/share/vm/gc/g1/concurrentG1Refine.hpp	Wed Sep 09 14:22:45 2015 +0200
+++ b/hotspot/src/share/vm/gc/g1/concurrentG1Refine.hpp	Wed Sep 09 09:19:32 2015 -0700
@@ -71,10 +71,15 @@
   // Reset the threshold step value based of the current zone boundaries.
   void reset_threshold_step();
 
+  ConcurrentG1Refine(G1CollectedHeap* g1h);
+
  public:
-  ConcurrentG1Refine(G1CollectedHeap* g1h, CardTableEntryClosure* refine_closure);
   ~ConcurrentG1Refine();
 
+  // Returns ConcurrentG1Refine instance if succeeded to create/initialize ConcurrentG1Refine and ConcurrentG1RefineThread.
+  // Otherwise, returns NULL with error code.
+  static ConcurrentG1Refine* create(G1CollectedHeap* g1h, CardTableEntryClosure* refine_closure, jint* ecode);
+
   void init(G1RegionToSpaceMapper* card_counts_storage);
   void stop();