test rename overhaul: step 8 - language tests

tests/language/src/DefaultImplementationTest.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 to verify that factory classes are working.
-
-// @static-clean
-
-interface Point default PointImplementation {
-  Point(int x, int y);
-
-  final int x;
-  final int y;
-}
-
-class PointImplementation implements Point {
-  const PointImplementation(int x, int y) : this.x = x, this.y = y;
-  final int x;
-  final int y;
-}
-
-class DefaultImplementationTest {
-  static void testMain() {
-    Point point = new Point(4, 2);
-    Expect.equals(4, point.x);
-    Expect.equals(2, point.y);
-  }
-}
-
-main() {
-  DefaultImplementationTest.testMain();
-}