Wrap ClassLiterals in DoExpressions instead of giving them BlockScopes.

src/parsing/parser.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_H_
 #define V8_PARSING_PARSER_H_
 
 #include "src/allocation.h"
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
@@ skipping 564 matching lines @@
       int function_token_position, FunctionLiteral::FunctionType type,
       LanguageMode language_mode, bool* ok);
   V8_INLINE void SkipLazyFunctionBody(
       int* materialized_literal_count, int* expected_property_count, bool* ok,
       Scanner::BookmarkScope* bookmark = nullptr);
   V8_INLINE ZoneList<Statement*>* ParseEagerFunctionBody(
       const AstRawString* name, int pos,
       const ParserFormalParameters& parameters, FunctionKind kind,
       FunctionLiteral::FunctionType function_type, bool* ok);
 
-  ClassLiteral* ParseClassLiteral(Type::ExpressionClassifier* classifier,
-                                  const AstRawString* name,
-                                  Scanner::Location class_name_location,
-                                  bool name_is_strict_reserved, int pos,
-                                  bool* ok);
+  Expression* ParseClassLiteral(Type::ExpressionClassifier* classifier,
+                                const AstRawString* name,
+                                Scanner::Location class_name_location,
+                                bool name_is_strict_reserved, int pos,
+                                bool* ok);
 
   V8_INLINE void MarkCollectedTailCallExpressions();
   V8_INLINE void MarkTailPosition(Expression* expression);
 
   V8_INLINE void CheckConflictingVarDeclarations(v8::internal::Scope* scope,
                                                  bool* ok);
 
   class TemplateLiteral : public ZoneObject {
    public:
     TemplateLiteral(Zone* zone, int pos)
@@ skipping 395 matching lines @@
                                 bool accept_IN, int pos, bool* ok);
 
   void RewriteDoExpression(Expression* expr, bool* ok);
 
   FunctionLiteral* ParseFunctionLiteral(
       const AstRawString* name, Scanner::Location function_name_location,
       FunctionNameValidity function_name_validity, FunctionKind kind,
       int function_token_position, FunctionLiteral::FunctionType type,
       LanguageMode language_mode, bool* ok);
 
-  ClassLiteral* ParseClassLiteral(ExpressionClassifier* classifier,
-                                  const AstRawString* name,
-                                  Scanner::Location class_name_location,
-                                  bool name_is_strict_reserved, int pos,
-                                  bool* ok);
+  Expression* ParseClassLiteral(ExpressionClassifier* classifier,
+                                const AstRawString* name,
+                                Scanner::Location class_name_location,
+                                bool name_is_strict_reserved, int pos,
+                                bool* ok);
 
   // Magical syntax support.
   Expression* ParseV8Intrinsic(bool* ok);
 
   // Get odd-ball literals.
   Literal* GetLiteralUndefined(int position);
 
   // Check if the scope has conflicting var/let declarations from different
   // scopes. This covers for example
   //
@@ skipping 299 matching lines @@
 
 DoExpression* ParserTraits::ParseDoExpression(bool* ok) {
   return parser_->ParseDoExpression(ok);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_H_