Allow eval and arguments as property names

src/preparser.h

Index: src/preparser.h
diff --git a/src/preparser.h b/src/preparser.h
index 29a2b55e83e89719ee6472c35f9826765adb5be6..e999118ed3188c1e7fad130501d4b50b5ec350b3 100644
--- a/src/preparser.h
+++ b/src/preparser.h
@@ -446,6 +446,17 @@ class ParserBase : public Traits {
       *ok = false;
       return;
     }
+    CheckStrictFunctionParameters(eval_args_error_loc, dupe_error_loc,
+                                  reserved_loc, ok);
+  }
+
+  // Validates strict mode for function parameter lists. This has to be
+  // done after parsing the function, since the function can declare
+  // itself strict.
+  void CheckStrictFunctionParameters(
+      const Scanner::Location& eval_args_error_loc,
+      const Scanner::Location& dupe_error_loc,
+      const Scanner::Location& reserved_loc, bool* ok) {
     if (eval_args_error_loc.IsValid()) {
       Traits::ReportMessageAt(eval_args_error_loc, "strict_eval_arguments");
       *ok = false;