cleanup fasta token classes

pkg/front_end/test/token_test.dart

Index: pkg/front_end/test/token_test.dart
diff --git a/pkg/front_end/test/token_test.dart b/pkg/front_end/test/token_test.dart
index 84150964690d5fdc2e50b67b85109b0b39a04aed..61cffe5239b958dac12338fc61b8fe08ab0ca362 100644
--- a/pkg/front_end/test/token_test.dart
+++ b/pkg/front_end/test/token_test.dart
@@ -104,8 +104,8 @@ class Foo {
     while (!token1.isEof) {
       if (token1 is fasta.StringToken) stringTokenFound = true;
       if (token1 is KeywordToken) keywordTokenFound = true;
-      if (token1 is fasta.SymbolToken) symbolTokenFound = true;
-      if (token1 is fasta.BeginGroupToken) beginGroupTokenFound = true;
+      if (token1.type == TokenType.OPEN_PAREN) symbolTokenFound = true;
+      if (token1 is BeginToken) beginGroupTokenFound = true;
 
       var copy1 = token1.copy();
       expect(copy1, isNotNull);