Traitify ParserBase and move functions there.

test/cctest/test-parsing.cc

Index: test/cctest/test-parsing.cc
diff --git a/test/cctest/test-parsing.cc b/test/cctest/test-parsing.cc
index 22d5056f8007c4afa1ae0f95cc813d3f22133e6c..f3f238caa965dd9f34904ce514092426256336f1 100644
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -1108,8 +1108,9 @@ enum ParserSyncTestResult {
   kError
 };
 
-
-void SetParserFlags(i::ParserBase* parser, i::EnumSet<ParserFlag> flags) {
+template <typename Traits>
+void SetParserFlags(i::ParserBase<Traits>* parser,
+                    i::EnumSet<ParserFlag> flags) {
   parser->set_allow_lazy(flags.Contains(kAllowLazy));
   parser->set_allow_natives_syntax(flags.Contains(kAllowNativesSyntax));
   parser->set_allow_harmony_scoping(flags.Contains(kAllowHarmonyScoping));