- Change "static final" to "static const" in the tests/ directory.

tests/standalone/io/test_extension_test.dart

 // Copyright (c) 2012, 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.
 //
 // Dart test program for testing native extensions.
 
 #import("dart:io");
 #import("dart:isolate");
 
 // The following source statements, hidden in a string, fool the test script
 // tools/testing/dart/multitest.dart
 // into copying the files into the generated_tests directory.
 // TODO(3919): Rewrite this test, not as a multitest, to copy them manually.
-final dummyString = '''
+const dummyString = '''
 #source('test_extension_tester.dart');
 #source('test_extension.dart');
 ''';
 
 void main() {
   Options options = new Options();
 
   // Make this a multitest so that the test scripts run a copy of it in
   // [build directory]/generated_tests.  This way, we can copy the shared
   // library for test_extension.dart to the test directory.
@@ skipping 44 matching lines @@
       print('Output of test_extension_tester.dart:');
       print('  stdout:');
       print(processResult.stdout);
       print('  stderr:');
       print(processResult.stderr);
       stdout.flush();
       exit(processResult.exitCode);
     });
   });
 }