[heap] Only visit strong links during scavenge of promoted objects

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index 7c94552d24c946738595c7dc376a8364caa05149..416b5535cdfaf4991cfef723bb1a7f11144bcdcc 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -1151,13 +1151,8 @@ class Heap {
   void IterateWeakRoots(ObjectVisitor* v, VisitMode mode);
 
   // Iterate pointers of promoted objects.
-  void IteratePromotedObject(HeapObject* target, int size,
-                             bool was_marked_black,
-                             ObjectSlotCallback callback);
-
-  void IteratePromotedObjectPointers(HeapObject* object, Address start,
-                                     Address end, bool record_slots,
-                                     ObjectSlotCallback callback);
+  void IterateAndScavengePromotedObject(HeapObject* target, int size,
+                                        bool was_marked_black);
 
   // ===========================================================================
   // Store buffer API. =========================================================
@@ -2336,7 +2331,6 @@ class Heap {
   friend class IdleScavengeObserver;
   friend class IncrementalMarking;
   friend class IncrementalMarkingJob;
-  friend class IteratePromotedObjectsVisitor;
   friend class LargeObjectSpace;
   friend class MarkCompactCollector;
   friend class MarkCompactMarkingVisitor;