Re-land "Add support for metadata on type variables to Fasta parser." (with fixes).

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 a9da17fb211d26193ace7370068b43244637e275..f9867c2e98faa39d698338e6eba687ecb29c20e5 100644
--- a/pkg/analyzer/test/generated/parser_fasta_test.dart
+++ b/pkg/analyzer/test/generated/parser_fasta_test.dart
@@ -1332,16 +1332,6 @@ 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