Revert of [heap] Remove size specializations in static object visitors.

src/objects-body-descriptors-inl.h

 // Copyright 2015 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_BODY_DESCRIPTORS_INL_H_
 #define V8_OBJECTS_BODY_DESCRIPTORS_INL_H_
 
 #include "src/assembler-inl.h"
 #include "src/objects-body-descriptors.h"
 #include "src/transitions.h"
@@ skipping 109 matching lines @@
     IterateBodyImpl(obj, kStartOffset, object_size, v);
   }
 
   template <typename StaticVisitor>
   static inline void IterateBody(HeapObject* obj, int object_size) {
     Heap* heap = obj->GetHeap();
     IterateBodyImpl<StaticVisitor>(heap, obj, kStartOffset, object_size);
   }
 
   static inline int SizeOf(Map* map, HeapObject* object) {
-    return map->instance_size();
-  }
-};
-
-class JSObject::FastBodyDescriptor final : public BodyDescriptorBase {
- public:
-  static const int kStartOffset = JSReceiver::kPropertiesOffset;
-
-  static bool IsValidSlot(HeapObject* obj, int offset) {
-    return offset >= kStartOffset;
-  }
-
-  template <typename ObjectVisitor>
-  static inline void IterateBody(HeapObject* obj, int object_size,
-                                 ObjectVisitor* v) {
-    IteratePointers(obj, kStartOffset, object_size, v);
-  }
-
-  template <typename StaticVisitor>
-  static inline void IterateBody(HeapObject* obj, int object_size) {
-    Heap* heap = obj->GetHeap();
-    IteratePointers<StaticVisitor>(heap, obj, kStartOffset, object_size);
-  }
-
-  static inline int SizeOf(Map* map, HeapObject* object) {
     return map->instance_size();
   }
 };
 
 // Iterates the function object according to the visiting policy.
 template <JSFunction::BodyVisitingPolicy body_visiting_policy>
 class JSFunction::BodyDescriptorImpl final : public BodyDescriptorBase {
  public:
   STATIC_ASSERT(kNonWeakFieldsEndOffset == kCodeEntryOffset);
   STATIC_ASSERT(kCodeEntryOffset + kPointerSize == kNextFunctionLinkOffset);
@@ skipping 485 matching lines @@
 
 template <typename ObjectVisitor>
 void HeapObject::IterateBodyFast(InstanceType type, int object_size,
                                  ObjectVisitor* v) {
   BodyDescriptorApply<CallIterateBody, void>(type, this, object_size, v);
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_BODY_DESCRIPTORS_INL_H_