Reland "Remove the weak list of array buffers"

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_
 
 
 namespace v8 {
 namespace internal {
@@ skipping 62 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, HeapObject::RawField(
-                          object, JSArrayBuffer::BodyDescriptor::kStartOffset),
-                HeapObject::RawField(object, JSArrayBuffer::kWeakNextOffset));
   VisitPointers(
-      heap, HeapObject::RawField(object,
-                                 JSArrayBuffer::kWeakNextOffset + kPointerSize),
+      heap,
+      HeapObject::RawField(object, JSArrayBuffer::BodyDescriptor::kStartOffset),
       HeapObject::RawField(object, JSArrayBuffer::kSizeWithInternalFields));
   return JSArrayBuffer::kSizeWithInternalFields;
 }
 
 
 template <typename StaticVisitor>
 int StaticNewSpaceVisitor<StaticVisitor>::VisitJSTypedArray(
     Map* map, HeapObject* object) {
   VisitPointers(
       map->GetHeap(),
@@ skipping 427 matching lines @@
 
 
 template <typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitJSArrayBuffer(
     Map* map, HeapObject* object) {
   Heap* heap = map->GetHeap();
 
   StaticVisitor::VisitPointers(
       heap,
       HeapObject::RawField(object, JSArrayBuffer::BodyDescriptor::kStartOffset),
-      HeapObject::RawField(object, JSArrayBuffer::kWeakNextOffset));
-  StaticVisitor::VisitPointers(
-      heap, HeapObject::RawField(object,
-                                 JSArrayBuffer::kWeakNextOffset + kPointerSize),
       HeapObject::RawField(object, JSArrayBuffer::kSizeWithInternalFields));
+  if (!JSArrayBuffer::cast(object)->is_external()) {
+    heap->RegisterLiveArrayBuffer(JSArrayBuffer::cast(object)->backing_store());
+  }
 }
 
 
 template <typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitJSTypedArray(
     Map* map, HeapObject* object) {
   StaticVisitor::VisitPointers(
       map->GetHeap(),
       HeapObject::RawField(object, JSTypedArray::BodyDescriptor::kStartOffset),
       HeapObject::RawField(object, JSTypedArray::kSizeWithInternalFields));
@@ skipping 323 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_