Revert of Replace slots buffer with remembered set.

src/heap/store-buffer-inl.h

Index: src/heap/store-buffer-inl.h
diff --git a/src/heap/store-buffer-inl.h b/src/heap/store-buffer-inl.h
index cf88e25aea934293fe7e2c66e96fabbbf25a1e9c..920ec3411dc16687efc604441a3f3037818f4c9d 100644
--- a/src/heap/store-buffer-inl.h
+++ b/src/heap/store-buffer-inl.h
@@ -13,6 +13,22 @@
 namespace v8 {
 namespace internal {
 
+void LocalStoreBuffer::Record(Address addr) {
+  if (top_->is_full()) top_ = new Node(top_);
+  top_->buffer[top_->count++] = addr;
+}
+
+void LocalStoreBuffer::Process(StoreBuffer* store_buffer) {
+  Node* current = top_;
+  while (current != nullptr) {
+    for (int i = 0; i < current->count; i++) {
+      Address slot = current->buffer[i];
+      Page* page = Page::FromAnyPointerAddress(heap_, slot);
+      RememberedSet<OLD_TO_NEW>::Insert(page, slot);
+    }
+    current = current->next;
+  }
+}
 
 }  // namespace internal
 }  // namespace v8