Initial Kythe support for plugins

pkg/analyzer_plugin/test/plugin/test_all.dart

Index: pkg/analyzer_plugin/test/plugin/test_all.dart
diff --git a/pkg/analyzer_plugin/test/plugin/test_all.dart b/pkg/analyzer_plugin/test/plugin/test_all.dart
index 1b61afb6e6decda99ab003cb9dc33aabd26132f4..48a3a8b58f5e95c23198b924c91a851b01979f02 100644
--- a/pkg/analyzer_plugin/test/plugin/test_all.dart
+++ b/pkg/analyzer_plugin/test/plugin/test_all.dart
@@ -7,6 +7,7 @@ import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'assist_mixin_test.dart' as assist_mixin_test;
 import 'completion_mixin_test.dart' as completion_mixin_test;
 import 'fix_mixin_test.dart' as fix_mixin_test;
+import 'kythe_mixin_test.dart' as kythe_mixin_test;
 import 'navigation_mixin_test.dart' as navigation_mixin_test;
 import 'plugin_test.dart' as plugin_test;
 
@@ -15,6 +16,7 @@ main() {
     assist_mixin_test.main();
     completion_mixin_test.main();
     fix_mixin_test.main();
+    kythe_mixin_test.main();
     navigation_mixin_test.main();
     plugin_test.main();
   }, name: 'plugin');