[cssom-view] Fix #159. Do not leak a closed node via offsetParent

[hayatoito]

My attempt to fix #159.

@tabatkins , could you review this?

Return the nearest ancestor unclosed node element of the element

"unclosed node element of the element" can be acceptable?

[TakayoshiKochi]

Hmm, can it be "unclosed element", just use "unclosed" as an adjective?

And in that case we need to add "unclosed element" in the glossary definition in the shadow dom spec as well in addition to "unclosed node"?

[zcorpan]

You could do <a lt="unclosed node">unclosed</a> element or some such. Also add [[!DOM]] at the end of the paragraph.

[zcorpan]

(The commit message should say [cssom-view], but we can fix that when merging.)

[tabatkins]

@hayatoito Yup, agree with @zcorpan's review. Fix those two nits, and --amend the commit message to use the right tag, and i'll merge.

[hayatoito]

@zcorpan @tabatkins Thanks! I did amend the commit.

You could do <a lt="unclosed node">unclosed</a> element or some such. Also add [[!DOM]] at the end of the paragraph.

Done.

(The commit message should say [cssom-view], but we can fix that when merging.)

The subject of the commit includeded [cssom-view], I think. I did not change the subject.
Is that okay?

[zcorpan]

Thanks! (It said [css-omview] rather than [cssom-view])