Add support for metadata on type variables to Fasta parser.

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 c272a1ac0cff1ec47602673ba32cc96b2e43f3ad..b7592828263340c95711a22619b63190a2c24521 100644
--- a/pkg/analyzer/test/generated/parser_fasta_test.dart
+++ b/pkg/analyzer/test/generated/parser_fasta_test.dart
@@ -1141,16 +1141,6 @@ class TopLevelParserTest_Fasta extends FastaParserTestCase
 
   @override
   @failingTest
-  void
-      test_parseCompilationUnitMember_function_generic_noReturnType_annotated() {
-    // TODO(paulberry,ahe): Fasta doesn't appear to support annotated type
-    // parameters.
-    super
-        .test_parseCompilationUnitMember_function_generic_noReturnType_annotated();
-  }
-
-  @override
-  @failingTest
   void test_parseDirectives_mixed() {
     // TODO(paulberry,ahe): This test verifies the analyzer parser's ability to
     // stop parsing as soon as the first non-directive is encountered; this is