Skip removal of stylesheet candidate node if not added.

Skip removal of stylesheet candidate node if not added.

There is a flag saying whether it was added which was already in use in
StyleElement::removedFrom. Also removed an unnecessary test and bogus
comment for HTMLLinkElement. StyleElement is only used by HTMLStyleElement
and SVGStyleElement.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=191792

[rune, 2015-03-05 23:08:34]

rune@opera.com changed reviewers:
+ morrita@chromium.org

[rune, 2015-03-12 08:12:34]

PTAL

[dglazkov, 2015-03-12 14:52:58]

dglazkov@chromium.org changed reviewers:
+ dglazkov@chromium.org

[dglazkov, 2015-03-12 14:52:58]

The CQ bit was checked by dglazkov@chromium.org

[dglazkov, 2015-03-12 14:52:58]

lgtm

[commit-bot: I haz the power, 2015-03-12 14:53:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/980343002/20001

[rune, 2015-03-12 15:00:04]

On 2015/03/12 14:52:58, dglazkov wrote:
> lgtm

thanks!

[commit-bot: I haz the power, 2015-03-12 19:15:15]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=191792