Remove dart2js_foreign.

dart/tests/compiler/dart2js_foreign/native_closure_identity_test.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.
-
-import "package:expect/expect.dart";
-import 'native_metadata.dart';
-
-typedef void MyFunctionType();
-
-@Native("*A")
-class A {
-  @native setClosure(MyFunctionType f);
-  @native check(MyFunctionType f);
-  @native invoke();
-}
-
-@native makeA() { return new A(); }
-
-@Native("""
-function A() {}
-A.prototype.setClosure = function(f) { this.f = f; };
-A.prototype.check = function(f) { return this.f === f; };
-A.prototype.invoke = function() { return this.f(); };
-makeA = function(){return new A;};
-""")
-void setup();
-
-var staticClosure;
-staticMethod() => 42;
-
-class B {
-  var instanceClosure;
-  instanceMethod() => 43;
-}
-
-checkUntyped(a, closure) {
-  a.setClosure(closure);
-  Expect.isTrue(a.check(closure));
-  Expect.equals(closure(), a.invoke());
-}
-
-checkTyped(A a, MyFunctionType closure) {
-  a.setClosure(closure);
-  Expect.isTrue(a.check(closure));
-  Expect.equals(closure(), a.invoke());
-}
-
-main() {
-  setup();
-
-  staticClosure = () => 44;
-  B b = new B();
-  b.instanceClosure = () => 45;
-
-  closureStatement() => 46;
-  var closureExpression = () => 47;
-
-  checkUntyped(makeA(), staticClosure);
-  checkTyped(makeA(), staticClosure);
-
-  checkUntyped(makeA(), staticMethod);
-  checkTyped(makeA(), staticMethod);
-
-  checkUntyped(makeA(), b.instanceClosure);
-  checkTyped(makeA(), b.instanceClosure);
-
-  checkUntyped(makeA(), b.instanceMethod);
-  checkTyped(makeA(), b.instanceMethod);
-
-  checkUntyped(makeA(), closureStatement);
-  checkTyped(makeA(), closureStatement);
-
-  checkUntyped(makeA(), closureExpression);
-  checkTyped(makeA(), closureExpression);
-}