Revert minification

tests/compiler/dart2js_native/native_class_fields_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.
-
-// Verify that native fields on classes are not renamed by the minifier.
-class A native "*A" {
-  int myLongPropertyName;
-  int getValue;
-
-  int method(int z) => myLongPropertyName;
-}
-
-
-void setup() native r"""
-function getter() {
-  return ++this.getValue;
-}
-
-function setter(x) {
-  this.getValue += 10;
-}
-  
-function A(){
-  var a = Object.create(
-      { constructor: { name: 'A'}},
-      { myLongPropertyName: { get: getter,
-                              set: setter,
-                              configurable: false,
-                              writeable: false
-                            }
-      });
-  a.getValue = 0;
-  return a;
-}
-
-makeA = function(){return new A;};
-""";
-
-A makeA() native { return new A(); }
-
-main() {
-  setup();
-  var a = makeA();
-  a.myLongPropertyName = 21;
-  int gotten = a.myLongPropertyName;
-  Expect.equals(11, gotten);
-
-  var a2 = makeA();
-  if (a2 is A) {
-    // Inside this 'if' the compiler knows that a2 is an A, so it is tempted
-    // to access myLongPropertyName directly, using its minified name.  But
-    // renaming of native properties can only work using getters and setters
-    // that access the original name.
-    a2.myLongPropertyName = 21;
-    int gotten = a2.myLongPropertyName;
-    Expect.equals(11, gotten);
-  }
-}
-