Roll jsshell deps to version 26

dart/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 62 matching lines @@
 polymer/test/unbind_test: Skip # uses dart:html
 third_party/angular_tests/browser_test: Skip # uses dart:html
 
 [$compiler == dart2dart]
 *: Skip
 
 [ $compiler == dart2js || $compiler == dart2dart ]
 source_maps/test/vlq_test: RuntimeError # A VLQ test checks for large numbers that
                                 # overflow in JS (numbers slightly larger than
                                 # 32 bits where we do bitwise operations).
-[ $runtime == ff && $system != windows ]
+[ ($runtime == ff || $runtime == jsshell) && $system != windows ]
 # Bug in Spidermonkey's Uint8ClampedArray on x64 (non-Win FF is x64, Win is x86)
 # See https://bugzilla.mozilla.org/show_bug.cgi?id=940972
 # Likely to get patched only on some versions of Firefox.
 typed_data/test/typed_buffers_test: RuntimeError
 
 [ $runtime == opera && $compiler == dart2js ]
 intl/test/find_default_locale_browser_test: Fail
 intl/test/date_time_format_http_request_test: Skip # Timeout.
 
 [ $runtime == ie9 ]
@@ skipping 233 matching lines @@
 collection/test/algorithms_test: PubGetError
 collection/test/iterable_zip_test: PubGetError
 collection/test/priority_queue_test: PubGetError
 collection/test/unmodifiable_collection_test: PubGetError
 collection/test/wrapper_test: PubGetError
 stack_trace/test/chain_test: PubGetError
 stack_trace/test/frame_test: PubGetError
 stack_trace/test/trace_test: PubGetError
 stack_trace/test/vm_test: PubGetError