Unify function name validation in Parser and PreParser.

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 1fc1403cd88fdae8c96314c2f1f2292a63a4846f..2b0995ace283838ea5a324a41f1c212d865f629d 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -649,9 +649,9 @@ class Parser : public ParserBase {
 
   ZoneList<Expression*>* ParseArguments(bool* ok);
   FunctionLiteral* ParseFunctionLiteral(
-      Handle<String> var_name,
+      Handle<String> name,
       Scanner::Location function_name_location,
-      bool name_is_reserved,
+      bool name_is_strict_reserved,
       bool is_generator,
       int function_token_position,
       FunctionLiteral::FunctionType type,