Revert of Only use FreeSpace objects in the free list.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 402010e91a7d8058eb9d45971cdcc2e27f60dbb3..5ee91913251c81f4833f9230afc419b59f7db384 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -3334,6 +3334,7 @@
 CAST_ACCESSOR(FixedDoubleArray)
 CAST_ACCESSOR(FixedTypedArrayBase)
 CAST_ACCESSOR(Foreign)
+CAST_ACCESSOR(FreeSpace)
 CAST_ACCESSOR(GlobalObject)
 CAST_ACCESSOR(HeapObject)
 CAST_ACCESSOR(JSArray)
@@ -3442,39 +3443,6 @@
 SYNCHRONIZED_SMI_ACCESSORS(String, length, kLengthOffset)
 
 
-FreeSpace* FreeSpace::next() {
-  DCHECK(map() == GetHeap()->raw_unchecked_free_space_map() ||
-         (!GetHeap()->deserialization_complete() && map() == NULL));
-  DCHECK_LE(kNextOffset + kPointerSize, nobarrier_size());
-  return reinterpret_cast<FreeSpace*>(
-      Memory::Address_at(address() + kNextOffset));
-}
-
-
-FreeSpace** FreeSpace::next_address() {
-  DCHECK(map() == GetHeap()->raw_unchecked_free_space_map() ||
-         (!GetHeap()->deserialization_complete() && map() == NULL));
-  DCHECK_LE(kNextOffset + kPointerSize, nobarrier_size());
-  return reinterpret_cast<FreeSpace**>(address() + kNextOffset);
-}
-
-
-void FreeSpace::set_next(FreeSpace* next) {
-  DCHECK(map() == GetHeap()->raw_unchecked_free_space_map() ||
-         (!GetHeap()->deserialization_complete() && map() == NULL));
-  DCHECK_LE(kNextOffset + kPointerSize, nobarrier_size());
-  base::NoBarrier_Store(
-      reinterpret_cast<base::AtomicWord*>(address() + kNextOffset),
-      reinterpret_cast<base::AtomicWord>(next));
-}
-
-
-FreeSpace* FreeSpace::cast(HeapObject* o) {
-  SLOW_DCHECK(!o->GetHeap()->deserialization_complete() || o->IsFreeSpace());
-  return reinterpret_cast<FreeSpace*>(o);
-}
-
-
 uint32_t Name::hash_field() {
   return READ_UINT32_FIELD(this, kHashFieldOffset);
 }