Add a generic remembered set class.

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 3546ee2173c473bed7a879b776a767042791b822..920ec3411dc16687efc604441a3f3037818f4c9d 100644
--- a/src/heap/store-buffer-inl.h
+++ b/src/heap/store-buffer-inl.h
@@ -6,31 +6,13 @@
 #define V8_STORE_BUFFER_INL_H_
 
 #include "src/heap/heap.h"
+#include "src/heap/remembered-set.h"
 #include "src/heap/spaces-inl.h"
 #include "src/heap/store-buffer.h"
 
 namespace v8 {
 namespace internal {
 
-uint32_t StoreBuffer::AddressToSlotSetAndOffset(Address addr, SlotSet** slots) {
-  MemoryChunk* chunk = MemoryChunk::FromAddress(addr);
-  uintptr_t offset = addr - chunk->address();
-  if (offset < MemoryChunk::kHeaderSize || chunk->owner() == nullptr) {
-    chunk = heap_->lo_space()->FindPage(addr);
-    offset = addr - chunk->address();
-  }
-  if (chunk->old_to_new_slots() == nullptr) {
-    chunk->AllocateOldToNewSlots();
-  }
-  if (offset < Page::kPageSize) {
-    *slots = chunk->old_to_new_slots();
-  } else {
-    *slots = &chunk->old_to_new_slots()[offset / Page::kPageSize];
-    offset = offset % Page::kPageSize;
-  }
-  return static_cast<uint32_t>(offset);
-}
-
 void LocalStoreBuffer::Record(Address addr) {
   if (top_->is_full()) top_ = new Node(top_);
   top_->buffer[top_->count++] = addr;
@@ -40,19 +22,14 @@ void LocalStoreBuffer::Process(StoreBuffer* store_buffer) {
   Node* current = top_;
   while (current != nullptr) {
     for (int i = 0; i < current->count; i++) {
-      store_buffer->Mark(current->buffer[i]);
+      Address slot = current->buffer[i];
+      Page* page = Page::FromAnyPointerAddress(heap_, slot);
+      RememberedSet<OLD_TO_NEW>::Insert(page, slot);
     }
     current = current->next;
   }
 }
 
-void StoreBuffer::Mark(Address addr) {
-  SlotSet* slots;
-  uint32_t offset;
-  offset = AddressToSlotSetAndOffset(addr, &slots);
-  slots->Insert(offset);
-}
-
 }  // namespace internal
 }  // namespace v8