Start unraveling circularities between analyzer and front_end/kernel.

pkg/front_end/test/subpackage_relationships_test.dart

Index: pkg/front_end/test/subpackage_relationships_test.dart
diff --git a/pkg/front_end/test/subpackage_relationships_test.dart b/pkg/front_end/test/subpackage_relationships_test.dart
index 7cd60233db0b4fac4c1f6aaa7ba9b2b2405f1d38..62b57ca5c4a50d683192d2cbdd14f29c0e7cd3fa 100644
--- a/pkg/front_end/test/subpackage_relationships_test.dart
+++ b/pkg/front_end/test/subpackage_relationships_test.dart
@@ -44,13 +44,10 @@ final subpackageRules = {
   ]),
   'lib/src/fasta/analyzer':
       new SubpackageRules(mayImportAnalyzer: true, allowedDependencies: [
-    'lib/src/scanner',
     'lib/src/fasta',
     'lib/src/fasta/builder',
     'lib/src/fasta/dill',
     'lib/src/fasta/kernel',
-    'lib/src/fasta/parser',
-    'lib/src/fasta/scanner',
     'lib/src/fasta/source',
   ]),
   'lib/src/fasta/builder': new SubpackageRules(allowedDependencies: [