Revert of Replace slots buffer with remembered set.

test/unittests/heap/remembered-set-unittest.cc

-// Copyright 2016 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include <limits>
-
-#include <set>
-
-#include "src/globals.h"
-#include "src/heap/remembered-set.h"
-#include "src/heap/spaces.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace v8 {
-namespace internal {
-
-TEST(LocalSlotsBuffer, InsertAndIterate) {
-  LocalSlotsBuffer buffer;
-  std::set<Address> untyped;
-  std::set<std::pair<SlotType, Address> > typed;
-
-  for (int k = 1000; k < 10000; k += NUMBER_OF_SLOT_TYPES) {
-    untyped.insert(reinterpret_cast<Address>(k));
-    buffer.Record(reinterpret_cast<Address>(k));
-    for (int i = 0; i < NUMBER_OF_SLOT_TYPES; i++) {
-      typed.insert(std::make_pair(static_cast<SlotType>(i),
-                                  reinterpret_cast<Address>(k + i)));
-      buffer.Record(static_cast<SlotType>(i), reinterpret_cast<Address>(k + i));
-    }
-  }
-  buffer.Iterate(
-      [&untyped](Address addr) {
-        EXPECT_NE(untyped.count(addr), 0);
-        untyped.erase(addr);
-      },
-      [&typed](SlotType type, Address addr) {
-        EXPECT_NE(typed.count(std::make_pair(type, addr)), 0);
-        typed.erase(std::make_pair(type, addr));
-      });
-  EXPECT_EQ(untyped.size(), 0);
-  EXPECT_EQ(typed.size(), 0);
-}
-
-}  // namespace internal
-}  // namespace v8