Revert of Wrap ClassLiterals in DoExpressions instead of giving them BlockScopes.

src/ast/ast.cc

Index: src/ast/ast.cc
diff --git a/src/ast/ast.cc b/src/ast/ast.cc
index a2fc8997a4a07be151afd82ac4c6de0016c762e7..6fa7f53071f14286dd0442f61c74c644607e57ad 100644
--- a/src/ast/ast.cc
+++ b/src/ast/ast.cc
@@ -141,8 +141,8 @@
 bool Expression::IsAnonymousFunctionDefinition() const {
   return (IsFunctionLiteral() &&
           AsFunctionLiteral()->IsAnonymousFunctionDefinition()) ||
-         (IsDoExpression() &&
-          AsDoExpression()->IsAnonymousFunctionDefinition());
+         (IsClassLiteral() &&
+          AsClassLiteral()->IsAnonymousFunctionDefinition());
 }
 
 void Expression::MarkTail() {
@@ -153,12 +153,6 @@
   } else if (IsBinaryOperation()) {
     AsBinaryOperation()->MarkTail();
   }
-}
-
-bool DoExpression::IsAnonymousFunctionDefinition() const {
-  // This is specifically to allow DoExpressions to represent ClassLiterals.
-  return represented_function_ != nullptr &&
-         represented_function_->raw_name()->length() == 0;
 }
 
 bool Statement::IsJump() const {