Cleanup FreeSpace: Remove getter for address of next pointer

src/heap/objects-visiting.h

 // Copyright 2012 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.
 
 #ifndef V8_OBJECTS_VISITING_H_
 #define V8_OBJECTS_VISITING_H_
 
 #include "src/allocation.h"
 #include "src/heap/heap.h"
 #include "src/heap/spaces.h"
@@ skipping 322 matching lines @@
     return SeqOneByteString::cast(object)
         ->SeqOneByteStringSize(map->instance_type());
   }
 
   INLINE(static int VisitSeqTwoByteString(Map* map, HeapObject* object)) {
     return SeqTwoByteString::cast(object)
         ->SeqTwoByteStringSize(map->instance_type());
   }
 
   INLINE(static int VisitFreeSpace(Map* map, HeapObject* object)) {
-    return FreeSpace::cast(object)->Size();
+    return FreeSpace::cast(object)->size();
   }
 
   INLINE(static int VisitJSArrayBuffer(Map* map, HeapObject* object));
   INLINE(static int VisitJSTypedArray(Map* map, HeapObject* object));
   INLINE(static int VisitJSDataView(Map* map, HeapObject* object));
   INLINE(static int VisitBytecodeArray(Map* map, HeapObject* object));
 
   class DataObjectVisitor {
    public:
     template <int object_size>
@@ skipping 134 matching lines @@
 // the next element. Given the head of the list, this function removes dead
 // elements from the list and if requested records slots for next-element
 // pointers. The template parameter T is a WeakListVisitor that defines how to
 // access the next-element pointers.
 template <class T>
 Object* VisitWeakList(Heap* heap, Object* list, WeakObjectRetainer* retainer);
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_VISITING_H_