[wasm] sundry trap handler fixes

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 376e898ea9c27f4bb78e91590bb27f7a292334bd..2614c05b6458ea97c6c0060f30e98e186b9ddc4a 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -6827,6 +6827,7 @@ void Code::WipeOutHeader() {
   }
   WRITE_FIELD(this, kNextCodeLinkOffset, NULL);
   WRITE_FIELD(this, kGCMetadataOffset, NULL);
+  WRITE_FIELD(this, kProtectedInstructionOffset, NULL);
 }
 
 
@@ -6910,6 +6911,7 @@ int Code::SizeIncludingMetadata() {
   size += deoptimization_data()->Size();
   size += handler_table()->Size();
   if (kind() == FUNCTION) size += source_position_table()->Size();
+  size += protected_instructions()->Size();
   return size;
 }