[parser] Clean up type definitions

src/parsing/expression-classifier.h

Index: src/parsing/expression-classifier.h
diff --git a/src/parsing/expression-classifier.h b/src/parsing/expression-classifier.h
index b2dff74c247d59d2f20379954ab69bbaf5952af8..c7c0b8efc2429dea157e0e08733804267677bd48 100644
--- a/src/parsing/expression-classifier.h
+++ b/src/parsing/expression-classifier.h
@@ -25,7 +25,7 @@ namespace internal {
   T(TailCallExpressionProduction, 9)         \
   T(AsyncArrowFormalParametersProduction, 10)
 
-template <typename Traits>
+template <typename Types>
 class ExpressionClassifier {
  public:
   enum ErrorKind : unsigned {
@@ -77,7 +77,7 @@ class ExpressionClassifier {
     NonSimpleParameter = 1 << 0
   };
 
-  explicit ExpressionClassifier(const typename Traits::Type::Base* base,
+  explicit ExpressionClassifier(const typename Types::Base* base,
                                 DuplicateFinder* duplicate_finder = nullptr)
       : zone_(base->impl()->zone()),
         non_patterns_to_rewrite_(base->impl()->GetNonPatternList()),
@@ -425,7 +425,7 @@ class ExpressionClassifier {
   }
 
   Zone* zone_;
-  ZoneList<typename Traits::Type::Expression>* non_patterns_to_rewrite_;
+  ZoneList<typename Types::Expression>* non_patterns_to_rewrite_;
   ZoneList<Error>* reported_errors_;
   DuplicateFinder* duplicate_finder_;
   // The uint16_t for non_pattern_begin_ will not be enough in the case,