Re-land beginning Dart 2.0 test migration.

tests/language_2/language_2.status

Index: tests/language_2/language_2.status
diff --git a/tests/language_2/language_2.status b/tests/language_2/language_2.status
new file mode 100644
index 0000000000000000000000000000000000000000..9f1720c9d6b4eb84cbd12176eab1d9dcd198e2cc
--- /dev/null
+++ b/tests/language_2/language_2.status
@@ -0,0 +1,10 @@
+# Copyright (c) 2017, 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.
+
+# The VM and dart2js do not implement the Dart 2.0 static type errors yet.
+# Analyzer does, but only when "--strong" is used.
+[ $runtime == vm || $compiler == dart2js || $runtime == dart_precompiled || ($compiler == dart2analyzer && ! $strong) ]

[jcollins, 2017/07/17 18:04:03]

would like to see us get to the point where !$strong isn't even considered in _2
directories

+abstract_beats_arguments_test: MissingCompileTimeError
+abstract_exact_selector_test/01: MissingCompileTimeError
+abstract_getter_test/01: MissingCompileTimeError