fasta tokens implement analyzer token API

pkg/front_end/test/scanner_replacement_test.dart

Index: pkg/front_end/test/scanner_replacement_test.dart
diff --git a/pkg/front_end/test/scanner_replacement_test.dart b/pkg/front_end/test/scanner_replacement_test.dart
index 63ea94f6bcfd3a64785afcd084da010d82f24886..fd756be72076b8d0412d44a3c47dcd36557fc481 100644
--- a/pkg/front_end/test/scanner_replacement_test.dart
+++ b/pkg/front_end/test/scanner_replacement_test.dart
@@ -4,6 +4,8 @@
 
 import 'dart:convert' show UTF8;
 
+import 'package:front_end/src/fasta/scanner/abstract_scanner.dart'
+    show fastaSupportsGenericMethodComments;
 import 'package:front_end/src/fasta/scanner/precedence.dart'
     show BAD_INPUT_INFO, EOF_INFO;
 import 'package:front_end/src/fasta/scanner/recover.dart'
@@ -37,7 +39,7 @@ class ScannerTest_Replacement extends ScannerTest {
   analyzer.Token scanWithListener(String source, ErrorListener listener,
       {bool genericMethodComments: false,
       bool lazyAssignmentOperators: false}) {
-    if (genericMethodComments) {
+    if (genericMethodComments && !fastaSupportsGenericMethodComments) {
       // Fasta doesn't support generic method comments.
       // TODO(danrubel): once the analyzer toolchain no longer needs generic
       // method comments, remove tests that exercise them.