Ensure that we don't mark weak heap references in the constant pool array.

src/objects-visiting-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 480 matching lines @@
   Heap* heap = map->GetHeap();
   ConstantPoolArray* constant_pool = ConstantPoolArray::cast(object);
   for (int i = 0; i < constant_pool->count_of_code_ptr_entries(); i++) {
     int index = constant_pool->first_code_ptr_index() + i;
     Address code_entry =
         reinterpret_cast<Address>(constant_pool->RawFieldOfElementAt(index));
     StaticVisitor::VisitCodeEntry(heap, code_entry);
   }
   for (int i = 0; i < constant_pool->count_of_heap_ptr_entries(); i++) {
     int index = constant_pool->first_heap_ptr_index() + i;
-    StaticVisitor::VisitPointer(heap,
-                                constant_pool->RawFieldOfElementAt(index));
+    Object** slot = constant_pool->RawFieldOfElementAt(index);
+    HeapObject* object = HeapObject::cast(*slot);
+    heap->mark_compact_collector()->RecordSlot(slot, slot, object);
+    if (!(constant_pool->get_weak_object_state() ==
+              ConstantPoolArray::WEAK_OBJECTS_IN_OPTIMIZED_CODE &&
+          Code::IsWeakObjectInOptimizedCode(object))) {
+      StaticVisitor::MarkObject(heap, object);
+    }
   }
 }
 
 
 template<typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitJSFunction(
     Map* map, HeapObject* object) {
   Heap* heap = map->GetHeap();
   JSFunction* function = JSFunction::cast(object);
   MarkCompactCollector* collector = heap->mark_compact_collector();
@@ skipping 429 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_