Fully deserialize the scope chain after parsing, not before

src/background-parsing-task.cc

Index: src/background-parsing-task.cc
diff --git a/src/background-parsing-task.cc b/src/background-parsing-task.cc
index fc5cbb45a68197d4e40060afd22d5bf8469fa952..0f243915b64b83bf8f1a1df88549bf80d3b929cf 100644
--- a/src/background-parsing-task.cc
+++ b/src/background-parsing-task.cc
@@ -50,9 +50,8 @@ BackgroundParsingTask::BackgroundParsingTask(
   // Parser needs to stay alive for finalizing the parsing on the main
   // thread.
   source_->parser.reset(new Parser(source_->info.get()));
-  source_->parser->DeserializeScopeChain(
-      source_->info.get(), Handle<Context>::null(),
-      Scope::DeserializationMode::kDeserializeOffHeap);
+  source_->parser->InspectScopeChain(source_->info.get(),
+                                     Handle<ScopeInfo>::null());
 }