Revert of [heap] Move slot filtering logic into sweeper.

src/heap/remembered-set.cc

Index: src/heap/remembered-set.cc
diff --git a/src/heap/remembered-set.cc b/src/heap/remembered-set.cc
index 786e1950765cc9d32fa25249de7cf0b6df705905..4e621611ac817abc6d356bba7e237f939014b4a8 100644
--- a/src/heap/remembered-set.cc
+++ b/src/heap/remembered-set.cc
@@ -13,6 +13,23 @@
 
 namespace v8 {
 namespace internal {
+
+template <PointerDirection direction>
+void RememberedSet<direction>::ClearInvalidSlots(Heap* heap,
+                                                 MemoryChunk* chunk) {
+  STATIC_ASSERT(direction == OLD_TO_NEW);
+  DCHECK(chunk->owner()->identity() == OLD_SPACE ||
+         chunk->owner()->identity() == MAP_SPACE);
+  SlotSet* slots = GetSlotSet(chunk);
+  if (slots != nullptr) {
+    slots->Iterate(
+        [heap, chunk](Address addr) {
+          Object** slot = reinterpret_cast<Object**>(addr);
+          return IsValidSlot(heap, chunk, slot) ? KEEP_SLOT : REMOVE_SLOT;
+        },
+        SlotSet::KEEP_EMPTY_BUCKETS);
+  }
+}
 
 template <PointerDirection direction>
 void RememberedSet<direction>::ClearInvalidTypedSlots(Heap* heap,
@@ -43,6 +60,8 @@
       chunk, reinterpret_cast<Address>(slot));
 }
 
+template void RememberedSet<OLD_TO_NEW>::ClearInvalidSlots(Heap* heap,
+                                                           MemoryChunk* chunk);
 template void RememberedSet<OLD_TO_NEW>::ClearInvalidTypedSlots(
     Heap* heap, MemoryChunk* chunk);