[heap] Reland decrease large object limit for regular heap objects.

src/heap/scavenger.cc

Index: src/heap/scavenger.cc
diff --git a/src/heap/scavenger.cc b/src/heap/scavenger.cc
index 74ed665c3feb97f4adee8cebf473e1993e3779ff..3e9f67b896ee614ce5163dfa2be995b2de557a31 100644
--- a/src/heap/scavenger.cc
+++ b/src/heap/scavenger.cc
@@ -216,7 +216,7 @@ class ScavengingVisitor : public StaticVisitorBase {
   template <ObjectContents object_contents, AllocationAlignment alignment>
   static inline void EvacuateObject(Map* map, HeapObject** slot,
                                     HeapObject* object, int object_size) {
-    SLOW_DCHECK(object_size <= Page::kMaxRegularHeapObjectSize);
+    SLOW_DCHECK(object_size <= Page::kAllocatableMemory);
     SLOW_DCHECK(object->Size() == object_size);
     Heap* heap = map->GetHeap();