[parser] Refactor parser and preparser traits

src/parsing/parser-base.h

Index: src/parsing/parser-base.h
diff --git a/src/parsing/parser-base.h b/src/parsing/parser-base.h
index 192235dd77ca84b87495b48042e8c1a52f13f4dc..a01253b26caf56c9b61deaf5d63ab0e96d0964e3 100644
--- a/src/parsing/parser-base.h
+++ b/src/parsing/parser-base.h
@@ -869,11 +869,31 @@ class ParserBase : public Traits {
     Traits::ReportMessageAt(source_location, message, arg, error_type);
   }
 
+  void ReportMessage(MessageTemplate::Template message, const AstRawString* arg,
+                     ParseErrorType error_type = kSyntaxError) {
+    Scanner::Location source_location = scanner()->location();
+    Traits::ReportMessageAt(source_location, message, arg, error_type);
+  }
+
+  void ReportMessageAt(Scanner::Location location,
+                       MessageTemplate::Template message,
+                       const char* arg = NULL,
+                       ParseErrorType error_type = kSyntaxError) {
+    Traits::ReportMessageAt(location, message, arg, error_type);
+  }
+
   void ReportMessageAt(Scanner::Location location,
                        MessageTemplate::Template message,
+                       const AstRawString* arg,
                        ParseErrorType error_type = kSyntaxError) {
-    Traits::ReportMessageAt(location, message, reinterpret_cast<const char*>(0),
-                            error_type);
+    Traits::ReportMessageAt(location, message, arg, error_type);
+  }
+
+  void ReportMessageAt(Scanner::Location location,
+                       MessageTemplate::Template message,
+                       ParseErrorType error_type) {
+    ReportMessageAt(location, message, static_cast<const char*>(nullptr),
+                    error_type);
   }
 
   void GetUnexpectedTokenMessage(