After expanding <symbol> in <use>, expand its siblings

After expanding <symbol> in <use>, expand its siblings

If the siblings are not expanded at this point, the loop of the children
of the ancestor will lose the siblings because it's still referencing
the old <symbol> element.
This little loop fell out in https://codereview.chromium.org/272523002.

BUG=589682
Committed: https://crrev.com/8c8aa6b2506795e72ea3ef7154b15e4abe0f4a6a
Cr-Commit-Position: refs/heads/master@{#377922}

[fs, 2016-02-26 16:54:24]

fs@opera.com changed reviewers:
+ pdr@chromium.org

[pdr., 2016-02-26 18:00:01]

On 2016/02/26 at 16:54:24, fs wrote:
> 

LGTM, this is the better approach.

[fs, 2016-02-26 18:02:53]

On 2016/02/26 at 18:00:01, pdr wrote:
> On 2016/02/26 at 16:54:24, fs wrote:
> > 
> 
> LGTM, this is the better approach.

Well, it only brings back the missing red square. The fix for the other
(primary) bug is brewing in https://codereview.chromium.org/1736283003 still.
(And I think we should clean up this mess a bit when we've fixed these...)

[fs, 2016-02-26 18:02:59]

The CQ bit was checked by fs@opera.com

[commit-bot: I haz the power, 2016-02-26 18:05:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1734983004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1734983004/1

[commit-bot: I haz the power, 2016-02-26 18:14:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-26 18:15:46]

Description was changed from

==========
After expanding <symbol> in <use>, expand its siblings

If the siblings are not expanded at this point, the loop of the children
of the ancestor will lose the siblings because it's still referencing
the old <symbol> element.
This little loop fell out in https://codereview.chromium.org/272523002.

BUG=589682
==========

to

==========
After expanding <symbol> in <use>, expand its siblings

If the siblings are not expanded at this point, the loop of the children
of the ancestor will lose the siblings because it's still referencing
the old <symbol> element.
This little loop fell out in https://codereview.chromium.org/272523002.

BUG=589682

Committed: https://crrev.com/8c8aa6b2506795e72ea3ef7154b15e4abe0f4a6a
Cr-Commit-Position: refs/heads/master@{#377922}
==========

[commit-bot: I haz the power, 2016-02-26 18:15:48]

Patchset 1 (id:??) landed as
https://crrev.com/8c8aa6b2506795e72ea3ef7154b15e4abe0f4a6a
Cr-Commit-Position: refs/heads/master@{#377922}