Wrap ClassLiterals in DoExpressions instead of giving them BlockScopes.

src/parsing/parameter-initializer-rewriter.cc

Index: src/parsing/parameter-initializer-rewriter.cc
diff --git a/src/parsing/parameter-initializer-rewriter.cc b/src/parsing/parameter-initializer-rewriter.cc
index 54b0c39a2f79601b64fe9d5661e6fef97d9b0335..f59b0fb368f9166b744d31d53762430e8df0839f 100644
--- a/src/parsing/parameter-initializer-rewriter.cc
+++ b/src/parsing/parameter-initializer-rewriter.cc
@@ -42,7 +42,6 @@ void Rewriter::VisitFunctionLiteral(FunctionLiteral* function_literal) {
 
 
 void Rewriter::VisitClassLiteral(ClassLiteral* class_literal) {
-  class_literal->scope()->ReplaceOuterScope(param_scope_);
   if (class_literal->extends() != nullptr) {
     Visit(class_literal->extends());
   }