Remove frog from the repository.

frog/tests/frog/native_class_is_check2_frog_test.dart

Index: frog/tests/frog/native_class_is_check2_frog_test.dart
diff --git a/frog/tests/frog/native_class_is_check2_frog_test.dart b/frog/tests/frog/native_class_is_check2_frog_test.dart
deleted file mode 100644
index ca1d03602eec41299218097312cd7538f895ff63..0000000000000000000000000000000000000000
--- a/frog/tests/frog/native_class_is_check2_frog_test.dart
+++ /dev/null
@@ -1,92 +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.
-
-// Test for correct is-checks on hidden native classes.
-
-interface I {
-  I read();
-  write(I x);
-}
-
-// Native implementation.
-
-class A implements I native "*A" {
-  // The native class accepts only other native instances.
-  A read() native;
-  write(A x) native;
-}
-
-makeA() native;
-
-void setup() native """
-// This code is all inside 'setup' and so not accesible from the global scope.
-function A(){}
-A.prototype.read = function() { return this._x; };
-A.prototype.write = function(x) { this._x = x; };
-makeA = function(){return new A};
-""";
-
-// Dart implementation must coexist with native implementation.
-
-class B implements I {
-  B b;
-  B read() { return b; }
-  write(B x) { b = x; }
-}
-
-main() {
-  setup();
-
-  var a1 = makeA();
-  var a2 = makeA();
-  var b1 = new B();
-  var b2 = new B();
-  var ob = new Object();
-
-  Expect.isFalse(ob is I);
-  Expect.isFalse(ob is A);
-  Expect.isFalse(ob is B);
-
-  Expect.isTrue(b1 is I);
-  Expect.isTrue(b1 is B);
-  Expect.isFalse(b1 is A);
-
-  Expect.isTrue(a1 is I);
-  Expect.isTrue(a1 is A);
-  Expect.isFalse(a1 is B);
-
-  new TypeParameterTest<B>(b1, b2);
-  new TypeParameterTest<I>(b1, b2);
-  new TypeParameterTest<A>(a1, a2);
-  new TypeParameterTest<I>(a1, a2);
-}
-
-class TypeParameterTest<T> {
-  T _x;
-  T _y;
-
-  TypeParameterTest(x, y) {
-    // In checked mode, the 'write' and 'read' operations will check arguments
-    // and results.
-    x.write(y);
-    y.write(x);
-    Expect.isTrue(x.read() === y);
-    Expect.isTrue(y.read() === x);
-
-    x.write(null);
-    y.write(null);
-    Expect.isTrue(x.read() === null);
-    Expect.isTrue(y.read() === null);
-
-    // Explicit checks against
-    var ob = new Object();
-    Expect.isTrue(ob is !T);
-    Expect.isTrue(x is T);
-    Expect.isTrue(y is T);
-
-    // In checked mode, there is a parameterized type assertion in assignment.
-    _x = x;
-    _y = y;
-  }
-}