improve recovery of invalid top level abstract modifier usage

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 339bb2727a2f9e9e9f3ca9d6b0fe15c2475eee14..dc0ef3f91e1fcf4bcee91470ea95d42547de5084 100644
--- a/pkg/analyzer/test/generated/parser_fasta_test.dart
+++ b/pkg/analyzer/test/generated/parser_fasta_test.dart
@@ -139,18 +139,6 @@ class ComplexParserTest_Fasta extends FastaParserTestCase
 @reflectiveTest
 class ErrorParserTest_Fasta extends FastaParserTestCase
     with ErrorParserTestMixin {
-  @override
-  @failingTest
-  void test_abstractEnum() {
-    super.test_abstractEnum();
-  }
-
-  @override
-  @failingTest
-  void test_abstractTypeDef() {
-    super.test_abstractTypeDef();
-  }
-
   @override
   @failingTest
   void test_annotationOnEnumConstant_first() {
@@ -2573,8 +2561,10 @@ class FastaParserTestCase extends Object
           List<ErrorCode> expectedErrorCodes) =>
       expectedErrorCodes.map((code) {
         if (code == ParserErrorCode.ABSTRACT_CLASS_MEMBER ||
+            code == ParserErrorCode.ABSTRACT_ENUM ||
             code == ParserErrorCode.ABSTRACT_TOP_LEVEL_FUNCTION ||
-            code == ParserErrorCode.ABSTRACT_TOP_LEVEL_VARIABLE)
+            code == ParserErrorCode.ABSTRACT_TOP_LEVEL_VARIABLE ||
+            code == ParserErrorCode.ABSTRACT_TYPEDEF)
           return ParserErrorCode.EXTRANEOUS_MODIFIER;
         return code;
       }).toList();
@@ -4611,6 +4601,13 @@ class TopLevelParserTest_Fasta extends FastaParserTestCase
     test_parseClassDeclaration_native();
   }
 
+  @override
+  @failingTest
+  void test_parseCompilationUnit_abstractAsPrefix_parameterized() {
+    // TODO(danrubel): built-in "abstract" cannot be used as a type
+    super.test_parseCompilationUnit_abstractAsPrefix_parameterized();
+  }
+
   @override
   @failingTest
   void test_parseCompilationUnit_builtIn_asFunctionName() {
@@ -4648,6 +4645,13 @@ class TopLevelParserTest_Fasta extends FastaParserTestCase
     assertNoErrors();
   }
 
+  @override
+  @failingTest
+  void test_parseCompilationUnitMember_abstractAsPrefix() {
+    // TODO(danrubel): built-in "abstract" cannot be used as a prefix
+    super.test_parseCompilationUnitMember_abstractAsPrefix();
+  }
+
   @failingTest
   void test_parseCompilationUnitMember_abstractAsPrefix2() {
     // TODO(danrubel): should not be generating an error