Differentate between code target pointers and heap pointers in constant pools.

src/mark-compact.h

Index: src/mark-compact.h
diff --git a/src/mark-compact.h b/src/mark-compact.h
index c966e2018e0e0c9b8ba87b02604dd91510e63b23..3ec91d3c16521566d46c644ebd4bd8cfeabdc1e5 100644
--- a/src/mark-compact.h
+++ b/src/mark-compact.h
@@ -692,8 +692,8 @@ class MarkCompactCollector {
 
   INLINE(void RecordSlot(Object** anchor_slot, Object** slot, Object* object));
 
-  void MigrateObject(Address dst,
-                     Address src,
+  void MigrateObject(HeapObject* dst,
+                     HeapObject* src,
                      int size,
                      AllocationSpace to_old_space);