Delete support for source mirrors

tests/compiler/dart2js/analyze_test_test.dart

 // 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 file.
 
 library dart2js.analyze_test.test;
 
 import 'dart:io';
 
 import 'package:async_helper/async_helper.dart';
 import 'package:compiler/src/apiimpl.dart' show
@@ skipping 12 matching lines @@
  *
  * Use an identifiable suffix of the file uri as key. Use a fixed substring of
  * the error/warning message in the list of white-listings for each file.
  */
 // TODO(johnniwinther): Support canonical URIs as keys.
 const Map<String, List/*<String|MessageKind>*/> WHITE_LIST = const {
   "/test/src/util/": const [
       "Library 'package:async/async.dart' doesn't export a "
       "'ForkableStream' declaration.",
   ],
-  "mirrors_test.dart": const [
-      MessageKind.INVALID_SYMBOL,
-      MessageKind.PRIVATE_IDENTIFIER,
-  ],
 };
 
 const List<String> SKIP_LIST = const <String>[
   // Helper files:
   "/data/",
   "http_launch_data/",
   "mirrors_helper.dart",
   "path%20with%20spaces/",
   "cps_ir/input/",
   // No longer maintained:
   "backend_dart/",
   // Broken tests:
   "quarantined/http_test.dart",
   // Package directory
   "packages/",
 ];
 
-const List<MessageKind> MESSAGE_SKIP_LIST = const <MessageKind>[
-  // TODO(johnniwinther): Support checking of this warning. (Issue 26132)
-  MessageKind.IMPORT_EXPERIMENTAL_MIRRORS,
-];
-
 main(List<String> arguments) {
   List<String> options = <String>[];
   List<Uri> uriList = <Uri>[];
   String filter;
   bool first = true;
   for (String argument in arguments) {
     if (argument.startsWith('-')) {
       options.add(argument == '-v' ? Flags.verbose : argument);
     } else if (first) {
       File file = new File(argument);
@@ skipping 32 matching lines @@
           if (!SKIP_LIST.any((skip) => file.path.contains(skip))) {
             uriList.add(file);
           }
         }
       }
     }
     await analyze(
         uriList,
         WHITE_LIST,
         mode: AnalysisMode.URI,
-        options: options,
-        skipList: MESSAGE_SKIP_LIST);
+        options: options);
   });
 }