Remove unnecessary ClassLiteral name member and simplify Function.name handling

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index c37953f04ad3c24480d8f57303e2ade4340ae02c..a7c346c0b8327d349dcd5e3aa3ce2c9af6e1571e 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -515,8 +515,6 @@ class ParserTraits {
                                   int pos);
   Expression* FunctionSentExpression(Scope* scope, AstNodeFactory* factory,
                                      int pos);
-  Expression* DefaultConstructor(bool call_super, Scope* scope, int pos,
-                                 int end_pos, LanguageMode language_mode);
   Literal* ExpressionFromLiteral(Token::Value token, int pos, Scanner* scanner,
                                  AstNodeFactory* factory);
   Expression* ExpressionFromIdentifier(const AstRawString* name,
@@ -968,8 +966,9 @@ class Parser : public ParserBase<ParserTraits> {
   Statement* BuildAssertIsCoercible(Variable* var);
 
   // Factory methods.
-  FunctionLiteral* DefaultConstructor(bool call_super, Scope* scope, int pos,
-                                      int end_pos, LanguageMode language_mode);
+  FunctionLiteral* DefaultConstructor(const AstRawString* name, bool call_super,
+                                      Scope* scope, int pos, int end_pos,
+                                      LanguageMode language_mode);
 
   // Skip over a lazy function, either using cached data if we have it, or
   // by parsing the function with PreParser. Consumes the ending }.