Simplified slot buffer logic during weak list visiting.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 0ea45296dfb93d6f4ec7e86c76d8084f1854762b..8e3cd3f2b05724860dea12d18b3a1329701b210d 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -1974,9 +1974,9 @@ class Heap {
   // Code to be run before and after mark-compact.
   void MarkCompactPrologue();
 
-  void ProcessNativeContexts(WeakObjectRetainer* retainer, bool record_slots);
-  void ProcessArrayBuffers(WeakObjectRetainer* retainer, bool record_slots);
-  void ProcessAllocationSites(WeakObjectRetainer* retainer, bool record_slots);
+  void ProcessNativeContexts(WeakObjectRetainer* retainer);
+  void ProcessArrayBuffers(WeakObjectRetainer* retainer);
+  void ProcessAllocationSites(WeakObjectRetainer* retainer);
 
   // Deopts all code that contains allocation instruction which are tenured or
   // not tenured. Moreover it clears the pretenuring allocation site statistics.