Start unraveling circularities between analyzer and front_end/kernel.

pkg/front_end/test/scanner_roundtrip_test.dart

Index: pkg/front_end/test/scanner_roundtrip_test.dart
diff --git a/pkg/front_end/test/scanner_roundtrip_test.dart b/pkg/front_end/test/scanner_roundtrip_test.dart
index 0b27e6b80ee71525adeab77915b8237a05f754b8..cdf61ecbe1324b82abaf6d9472c1c2933d3cd268 100644
--- a/pkg/front_end/test/scanner_roundtrip_test.dart
+++ b/pkg/front_end/test/scanner_roundtrip_test.dart
@@ -2,7 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'package:front_end/src/fasta/analyzer/token_utils.dart';
+import 'package:analyzer/src/fasta/token_utils.dart';
 import 'package:front_end/src/fasta/scanner/precedence.dart';
 import 'package:front_end/src/scanner/token.dart';
 import 'package:front_end/src/fasta/scanner/string_scanner.dart';