Add 'withKeyword' to mixin application with Fasta.

pkg/analyzer/test/generated/parser_fasta_test.dart

Index: pkg/analyzer/test/generated/parser_fasta_test.dart
diff --git a/pkg/analyzer/test/generated/parser_fasta_test.dart b/pkg/analyzer/test/generated/parser_fasta_test.dart
index 32fe526365d290250c783dac395eecfb74d182f0..0844d151008905318b7a3d340966e44d499a7c39 100644
--- a/pkg/analyzer/test/generated/parser_fasta_test.dart
+++ b/pkg/analyzer/test/generated/parser_fasta_test.dart
@@ -1169,13 +1169,6 @@ class TopLevelParserTest_Fasta extends FastaParserTestCase
 
   @override
   @failingTest
-  void test_parseClassDeclaration_typeAlias_withB() {
-    // TODO(paulberry,ahe): capture `with` token.
-    super.test_parseClassDeclaration_typeAlias_withB();
-  }
-
-  @override
-  @failingTest
   void test_parseCompilationUnit_builtIn_asFunctionName() {
     // TODO(paulberry,ahe): Fasta's parser is confused when one of the built-in
     // identifiers `export`, `import`, `library`, `part`, or `typedef` appears