[interpreter] Add field for source position table to byte code array.

src/objects-body-descriptors-inl.h

Index: src/objects-body-descriptors-inl.h
diff --git a/src/objects-body-descriptors-inl.h b/src/objects-body-descriptors-inl.h
index 8fe4c0a84a078cebcca999e6f00160699f71984f..eb4af3002353645b8f0a9acd69804440026a25df 100644
--- a/src/objects-body-descriptors-inl.h
+++ b/src/objects-body-descriptors-inl.h
@@ -193,7 +193,8 @@ class JSArrayBuffer::BodyDescriptor final : public BodyDescriptorBase {
 class BytecodeArray::BodyDescriptor final : public BodyDescriptorBase {
  public:
   static bool IsValidSlot(HeapObject* obj, int offset) {
-    return offset == kConstantPoolOffset || offset == kHandlerTableOffset;
+    return offset >= kConstantPoolOffset &&
+           offset <= kSourcePositionTableOffset;
   }
 
   template <typename ObjectVisitor>
@@ -201,6 +202,7 @@ class BytecodeArray::BodyDescriptor final : public BodyDescriptorBase {
                                  ObjectVisitor* v) {
     IteratePointer(obj, kConstantPoolOffset, v);
     IteratePointer(obj, kHandlerTableOffset, v);
+    IteratePointer(obj, kSourcePositionTableOffset, v);
   }
 
   template <typename StaticVisitor>
@@ -208,6 +210,7 @@ class BytecodeArray::BodyDescriptor final : public BodyDescriptorBase {
     Heap* heap = obj->GetHeap();
     IteratePointer<StaticVisitor>(heap, obj, kConstantPoolOffset);
     IteratePointer<StaticVisitor>(heap, obj, kHandlerTableOffset);
+    IteratePointer<StaticVisitor>(heap, obj, kSourcePositionTableOffset);
   }
 
   static inline int SizeOf(Map* map, HeapObject* obj) {