[polymer] mark register_test failing on ie10

pkg/pkg.status

 # 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.
 
 # Don't run any test-like files that show up in packages directories. It
 # shouldn't be necessary to run "pub install" in these packages, but if you do
 # it shouldn't break the tests.
 */packages/*/*: Skip
 */*/packages/*/*: Skip
 */*/*/packages/*/*: Skip
@@ skipping 117 matching lines @@
 template_binding/test/custom_element_bindings_test: Fail, Timeout # Issue 16717
 polymer/test/bind_mdv_test: RuntimeError # Issue 14412, 13260
 matcher/test/matchers_test: RuntimeError # Issue 17762
 
 [ $ie ]
 polymer/test/noscript_test: RuntimeError, Pass # Issue 13260
 intl/test/date_time_format_http_request_test: Fail # Issue 8983
 
 [ $runtime == ie10 ]
 typed_data/test/typed_buffers_test/none: Fail # Issue   17607 (I put this here explicitly, since this is not the same as on ie9)
+polymer/test/register_test: Fail # Issue 18870
 
 [ $runtime == safari || $runtime == safarimobilesim ]
 # Unexplained errors only occuring on Safari.
 typed_data/test/typed_buffers_test: RuntimeError
 
 # Skip browser-specific tests on VM
 [ $runtime == vm ]
 path/test/browser_test: Fail, OK # Uses dart:html
 intl/test/find_default_locale_browser_test: Skip
 intl/test/date_time_format_http_request_test: Skip
@@ skipping 206 matching lines @@
 http/test/multipart_test: Fail
 http/test/request_test: Fail
 http/test/response_test: Fail
 oauth2/test/authorization_code_grant_test: Fail
 oauth2/test/client_test: Fail
 oauth2/test/credentials_test: Fail
 oauth2/test/handle_access_token_response_test: Fail
 
 [ $runtime == drt ]
 http/test/html/client_test: Skip # Issue 18566