Immediatelly promote marked objects

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index 150647fbc7c0d2ad31dcc8a36ceaa8e01e54b833..6e481ad576c38c410b8894e6485fbc3e940cc0db 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -301,7 +301,7 @@ class Scavenger;
 class ScavengeJob;
 class WeakObjectRetainer;
 
-enum PromotionMode { FORCE_PROMOTION, DEFAULT_PROMOTION };
+enum PromotionMode { FORCE_PROMOTION, PROMOTE_MARKED, DEFAULT_PROMOTION };
 
 typedef void (*ObjectSlotCallback)(HeapObject** from, HeapObject* to,
                                    PromotionMode mode);
@@ -775,9 +775,12 @@ class Heap {
 
   void VisitExternalResources(v8::ExternalResourceVisitor* visitor);
 
+  inline PromotionMode CurrentPromotionMode();
+
   // An object should be promoted if the object has survived a
   // scavenge operation.
-  inline bool ShouldBePromoted(Address old_address, int object_size);
+  inline bool ShouldBePromoted(Address old_address, int object_size,
+                               PromotionMode promotion_mode);
 
   void ClearNormalizedMapCaches();