Remove dart2js_foreign.

dart/tests/compiler/dart2js_foreign/native_class_is_check3_test.dart

-// 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 simple is-checks on hidden native classes.
-
-import "package:expect/expect.dart";
-import 'native_metadata.dart';
-
-abstract class J {
-}
-
-abstract class I extends J {
-  I read();
-  write(I x);
-}
-
-// Native implementation.
-
-@Native("*A")
-class A implements I  {
-  // The native class accepts only other native instances.
-  @native A read();
-  @native write(A x);
-}
-
-@Native("*B")
-class B extends A  {
-}
-
-@native makeA();
-@native makeB();
-
-@Native("""
-// This code is all inside 'setup' and so not accesible from the global scope.
-function inherits(child, parent) {
-  if (child.prototype.__proto__) {
-    child.prototype.__proto__ = parent.prototype;
-  } else {
-    function tmp() {};
-    tmp.prototype = parent.prototype;
-    child.prototype = new tmp();
-    child.prototype.constructor = child;
-  }
-}
-function A(){}
-function B(){}
-inherits(B, A);
-A.prototype.read = function() { return this._x; };
-A.prototype.write = function(x) { this._x = x; };
-makeA = function(){return new A};
-makeB = function(){return new B};
-""")
-void setup();
-
-class C {}
-
-main() {
-  setup();
-
-  var a1 = makeA();
-  var b1 = makeB();
-  var ob = new Object();
-
-  Expect.isFalse(ob is J);
-  Expect.isFalse(ob is I);
-  Expect.isFalse(ob is A);
-  Expect.isFalse(ob is B);
-  Expect.isFalse(ob is C);
-
-  // Use b1 first to prevent a1 is checks patching the A prototype.
-  Expect.isTrue(b1 is J);
-  Expect.isTrue(b1 is I);
-  Expect.isTrue(b1 is A);
-  Expect.isTrue(b1 is B);
-  Expect.isTrue(b1 is !C);
-
-  Expect.isTrue(a1 is J);
-  Expect.isTrue(a1 is I);
-  Expect.isTrue(a1 is A);
-  Expect.isTrue(a1 is !B);
-  Expect.isTrue(a1 is !C);
-}