Implement import scope

tests/language/library2_negative_test.dart

Index: tests/language/library2_negative_test.dart
===================================================================
--- tests/language/library2_negative_test.dart	(revision 10922)
+++ tests/language/library2_negative_test.dart	(working copy)
@@ -1,14 +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.
-
-// This test should fail to load because we are importing two libraries
-// which define the same top level name.
-
-#library("Library2NegativeTest.dart");
-#import("library3.dart");  // imports library2.dart and defines foo/foo1.
-#import("library4.dart");  // imports library2.dart and defines foo/foo1.
-
-main() {
-  Expect.equals(0, foo1);
-}