Move tests using frog 'native' extension from tests/language to frog/tests

tests/language/src/NativePropertyFrogTest.dart

Index: tests/language/src/NativePropertyFrogTest.dart
diff --git a/tests/language/src/NativePropertyFrogTest.dart b/tests/language/src/NativePropertyFrogTest.dart
deleted file mode 100644
index 61b4808cee6085534fc8e04dc4f71f2b4d1dcac5..0000000000000000000000000000000000000000
--- a/tests/language/src/NativePropertyFrogTest.dart
+++ /dev/null
@@ -1,52 +0,0 @@
-// Copyright (c) 2011, 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.
-
-// Properties on hidden native classes.
-
-class A native "*A" {
-
-  // Setters and getters should be similar to these methods:
-  int getX() native 'return this._x;';
-  void setX(int value) native 'this._x = value;';
-
-  int get X() native;
-  set X(int value) native;
-
-  int get Y() native;
-  set Y(int value) native;
-
-  int get Z() native 'return this._z;';
-  set Z(int value) native 'this._z = value;';
-}
-
-A makeA() native { return new A(); }
-
-void setup() native """
-function A() {}
-
-Object.defineProperty(A.prototype, "X", {
-  get: function () { return this._x; },
-  set: function (v) { this._x = v; }
-});
-
-makeA = function(){return new A;};
-""";
-
-
-main() {
-  setup();
-
-  var a = makeA();
-
-  a.setX(5);
-  Expect.equals(5, a.getX());
-
-  a.X = 10;
-  a.Y = 20;
-  a.Z = 30;
-
-  Expect.equals(10, a.X);
-  Expect.equals(20, a.Y);
-  Expect.equals(30, a.Z);
-}