Fully deserialize the scope chain after parsing, not before

src/compiler-dispatcher/compiler-dispatcher-job.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler-dispatcher/compiler-dispatcher-job.h"
 
 #include "src/assert-scope.h"
 #include "src/compilation-info.h"
 #include "src/compiler.h"
 #include "src/global-handles.h"
@@ skipping 65 matching lines @@
   parse_info_->set_hash_seed(isolate_->heap()->HashSeed());
   parse_info_->set_is_named_expression(shared->is_named_expression());
   parse_info_->set_calls_eval(shared->scope_info()->CallsEval());
   parse_info_->set_compiler_hints(shared->compiler_hints());
   parse_info_->set_start_position(shared->start_position());
   parse_info_->set_end_position(shared->end_position());
   parse_info_->set_unicode_cache(unicode_cache_.get());
   parse_info_->set_language_mode(shared->language_mode());
 
   parser_.reset(new Parser(parse_info_.get()));
-  parser_->DeserializeScopeChain(
-      parse_info_.get(), handle(function_->context(), isolate_),
-      Scope::DeserializationMode::kDeserializeOffHeap);
+  parser_->DeserializeScopeChain(parse_info_.get(),
+                                 handle(function_->context(), isolate_));
 
   Handle<String> name(String::cast(shared->name()));
   parse_info_->set_function_name(
       parse_info_->ast_value_factory()->GetString(name));
   status_ = CompileJobStatus::kReadyToParse;
 }
 
 void CompilerDispatcherJob::Parse() {
   DCHECK(can_parse_on_background_thread_ ||
          ThreadId::Current().Equals(isolate_->thread_id()));
@@ skipping 154 matching lines @@
   if (!source_.is_null()) {
     i::GlobalHandles::Destroy(Handle<Object>::cast(source_).location());
     source_ = Handle<String>::null();
   }
 
   status_ = CompileJobStatus::kInitial;
 }
 
 }  // namespace internal
 }  // namespace v8