Add flag to trace object groups

src/global-handles.h

Index: src/global-handles.h
diff --git a/src/global-handles.h b/src/global-handles.h
index 7047d8ca015d7344022cb61e4fe4d18308803a8c..43c0d9c2f65e5c49f8d24dfc155fc00e27e0859d 100644
--- a/src/global-handles.h
+++ b/src/global-handles.h
@@ -242,6 +242,9 @@ class GlobalHandles {
   // can be skipped and false otherwise.
   bool IterateObjectGroups(ObjectVisitor* v, WeakSlotCallbackWithHeap can_skip);
 
+  // Print all objects in object groups
+  void PrintObjectGroups();
+
   // Add an object group.
   // Should be only used in GC callback function before a collection.
   // All groups are destroyed after a garbage collection.
@@ -355,6 +358,7 @@ class GlobalHandles {
   List<PendingPhantomCallback> pending_phantom_callbacks_;
 
   friend class Isolate;
+  friend class ObjectGroupsTracer;

[ulan, 2016/03/08 20:23:33]

Not needed.

[Marcel Hlopko, 2016/03/09 09:30:30]

Done.

 
   DISALLOW_COPY_AND_ASSIGN(GlobalHandles);
 };