[objects] do not visit ArrayBuffer's backing store

src/heap/objects-visiting-inl.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_INL_H_
 #define V8_OBJECTS_VISITING_INL_H_
 
 #include "src/heap/array-buffer-tracker.h"
 #include "src/heap/objects-visiting.h"
 #include "src/ic/ic-state.h"
@@ skipping 74 matching lines @@
   table_.template RegisterSpecializations<StructVisitor, kVisitStruct,
                                           kVisitStructGeneric>();
 }
 
 
 template <typename StaticVisitor>
 int StaticNewSpaceVisitor<StaticVisitor>::VisitJSArrayBuffer(
     Map* map, HeapObject* object) {
   Heap* heap = map->GetHeap();
 
-  VisitPointers(
-      heap, object,
-      HeapObject::RawField(object, JSArrayBuffer::BodyDescriptor::kStartOffset),
-      HeapObject::RawField(object, JSArrayBuffer::kSizeWithInternalFields));
+  JSArrayBuffer::JSArrayBufferIterateBody<
+      StaticNewSpaceVisitor<StaticVisitor> >(heap, object);
   if (!JSArrayBuffer::cast(object)->is_external()) {
     heap->array_buffer_tracker()->MarkLive(JSArrayBuffer::cast(object));
   }
   return JSArrayBuffer::kSizeWithInternalFields;
 }
 
 
 template <typename StaticVisitor>
 int StaticNewSpaceVisitor<StaticVisitor>::VisitJSTypedArray(
     Map* map, HeapObject* object) {
@@ skipping 412 matching lines @@
       HeapObject::RawField(object, JSRegExp::kPropertiesOffset),
       HeapObject::RawField(object, last_property_offset));
 }
 
 
 template <typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitJSArrayBuffer(
     Map* map, HeapObject* object) {
   Heap* heap = map->GetHeap();
 
-  StaticVisitor::VisitPointers(
-      heap, object,
-      HeapObject::RawField(object, JSArrayBuffer::BodyDescriptor::kStartOffset),
-      HeapObject::RawField(object, JSArrayBuffer::kSizeWithInternalFields));
+  JSArrayBuffer::JSArrayBufferIterateBody<StaticVisitor>(heap, object);
   if (!JSArrayBuffer::cast(object)->is_external() &&
       !heap->InNewSpace(object)) {
     heap->array_buffer_tracker()->MarkLive(JSArrayBuffer::cast(object));
   }
 }
 
 
 template <typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitJSTypedArray(
     Map* map, HeapObject* object) {
@@ skipping 347 matching lines @@
 
   RelocIterator it(this, mode_mask);
   for (; !it.done(); it.next()) {
     it.rinfo()->template Visit<StaticVisitor>(heap);
   }
 }
 }
 }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_VISITING_INL_H_