[parser] Refactor AstTraversalVisitor

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 187b4023e4168078187c3af9e12f2460ee4db579..40cc0af818cbccfa76b2d1fa5c187570d4cf942b 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -838,12 +838,11 @@ v8_source_set("v8_base") {
     "src/assert-scope.h",
     "src/ast/ast-expression-rewriter.cc",
     "src/ast/ast-expression-rewriter.h",
-    "src/ast/ast-expression-visitor.cc",
-    "src/ast/ast-expression-visitor.h",
     "src/ast/ast-literal-reindexer.cc",
     "src/ast/ast-literal-reindexer.h",
     "src/ast/ast-numbering.cc",
     "src/ast/ast-numbering.h",
+    "src/ast/ast-traversal-visitor.h",
     "src/ast/ast-type-bounds.h",
     "src/ast/ast-value-factory.cc",
     "src/ast/ast-value-factory.h",