allow disabling of ArrayBuffer neutering

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index c00ecddb565afc5529e44a840c594e9dcf59dfa4..b0996afb82e328fab772a53aaa05f7f3eeb3ddd6 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -6300,6 +6300,16 @@ void JSArrayBuffer::set_should_be_freed(bool value) {
 }
 
 
+bool JSArrayBuffer::is_neuterable() {
+  return BooleanBit::get(flag(), kIsNeuterableBit);
+}
+
+
+void JSArrayBuffer::set_is_neuterable(bool value) {
+  set_flag(BooleanBit::set(flag(), kIsNeuterableBit, value));
+}
+
+
 ACCESSORS(JSArrayBuffer, weak_next, Object, kWeakNextOffset)
 ACCESSORS(JSArrayBuffer, weak_first_view, Object, kWeakFirstViewOffset)