The following tests in fast/dom/shadow fail:
fast/dom/shadow/access-key.html
fast/dom/shadow/activeelement-should-be-shadowhost.html
fast/dom/shadow/content-child-whitespace-between-span.html
fast/dom/shadow/content-element-includer.html
fast/dom/shadow/content-element-renderers.html
fast/dom/shadow/create-content-element.html
fast/dom/shadow/get-element-by-id-in-shadow-root.html
fast/dom/shadow/shadow-boundary-crossing.html
fast/dom/shadow/shadow-boundary-events.html
fast/dom/shadow/shadow-host-transfer-focus.html
fast/dom/shadow/shadow-root-node-list.html
fast/dom/shadow/shadow-root-text-child.html
fast/dom/shadow/tab-order-iframe-and-shadow.html
fast/dom/shadow/tree-scope-crash.html

Please check the attached reference and actual dump files.