[webcomponents] Describe focus navigation order for the case with tabindex=-1 (#35)

This is a proposed draft of shadow navigation order when shadow host or <shadow> with
tabindex=-1, corresponds to https://www.w3.org/Bugs/Public/show_bug.cgi?id=27965 .

You can view, comment on, or merge this pull request online at:

  https://github.com/w3c/webcomponents/pull/35

-- Commit Summary --

  * Describe focus navigation order for the case with tabindex=-1

-- File Changes --

    M spec/shadow/index.html (2)

-- Patch Links --

https://github.com/w3c/webcomponents/pull/35.patch
https://github.com/w3c/webcomponents/pull/35.diff

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/webcomponents/pull/35