[async-await] (simpler) fix for Return in try/finally in async functions

src/parsing/parser-base.h

 // Copyright 2012 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.
 
 #ifndef V8_PARSING_PARSER_BASE_H
 #define V8_PARSING_PARSER_BASE_H
 
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
@@ skipping 409 matching lines @@
     void SkipMaterializedLiterals(int count) {
       next_materialized_literal_index_ += count;
     }
 
     void AddProperty() { expected_property_count_++; }
     int expected_property_count() { return expected_property_count_; }
 
     FunctionKind kind() const { return scope()->function_kind(); }
     FunctionState* outer() const { return outer_function_state_; }
 
-    void set_generator_object_variable(typename Types::Variable* variable) {
-      DCHECK_NOT_NULL(variable);
-      DCHECK(IsResumableFunction(kind()));
-      DCHECK(scope()->has_forced_context_allocation());
-      generator_object_variable_ = variable;
-    }
     typename Types::Variable* generator_object_variable() const {
-      return generator_object_variable_;
+      return scope()->generator_object_var();
     }
 
-    void set_promise_variable(typename Types::Variable* variable) {
-      DCHECK(variable != NULL);
-      DCHECK(IsAsyncFunction(kind()));
-      promise_variable_ = variable;
-    }
     typename Types::Variable* promise_variable() const {
-      return promise_variable_;
+      return scope()->promise_var();
     }
 
     const ZoneList<DestructuringAssignment>&
         destructuring_assignments_to_rewrite() const {
       return destructuring_assignments_to_rewrite_;
     }
 
     TailCallExpressionList& tail_call_expressions() {
       return tail_call_expressions_;
     }
@@ skipping 5317 matching lines @@
 }
 
 #undef CHECK_OK
 #undef CHECK_OK_CUSTOM
 #undef CHECK_OK_VOID
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_BASE_H