Ensure all tests are analyzed.

pkg/front_end/testing.json

 {
 "":"Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file",
 "":"for details. All rights reserved. Use of this source code is governed by a",
 "":"BSD-style license that can be found in the LICENSE.md file.",
 
   "packages": "../../.packages",
 
   "suites": [
 
     {
@@ skipping 183 matching lines @@
     }
   ],
 
   "analyze": {
 
     "options": "analysis_options.yaml",
 
     "uris": [
       "lib/",
       "tool/",
+      "test/",
       "../kernel/lib/"
     ],
 
-    "note": "Tests are included via git grep below.",
-
     "git grep": {
       "pathspecs": [ "*.dart" ],
       "patterns": [
         "package:front_end/",
         "package:kernel/"
       ]
     },
 
     "exclude": [
       "^pkg/analysis_server/lib/src/analysis_server\\.dart"
     ]
   }
 }