Re-land beginning Dart 2.0 test migration.

tests/language/abstract_beats_arguments_test.dart

-// Copyright (c) 2015, 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.
-
-import "package:expect/expect.dart";
-
-// When an instantiation of an abstract class has the wrong arguments, an
-// AbstractClassInstantiationError is thrown, not a NoSuchMethodError.
-
-abstract class A {
-  A() {}
-}
-
-class B {
-  B() {}
-}
-
-bool isAbstractClassInstantiationError(e) =>
-    e is AbstractClassInstantiationError;
-
-bool isNoSuchMethodError(e) => e is NoSuchMethodError;
-
-void main() {
-  Expect.throws(() => new A(), isAbstractClassInstantiationError);
-
-  Expect.throws(() => new B(1), isNoSuchMethodError);
-  Expect.throws(() => new A(1), isAbstractClassInstantiationError);
-}