Editing: Let Selection.collapse with null clears selection.

Editing: Let Selection.collapse with null clears selection.

The current spec says Selection.collapse(null) raises exception and the 
implementation follows.
However, many web apps assume that chrome clears selection when 
Selection.collapse(null) calls.
Thus we revert the behavior.

BUG=395318
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=181487

[yoichio, 2014-09-05 07:09:47]

yoichio@chromium.org changed reviewers:
+ ojan@chromium.org, yosin@chromium.org

[yoichio, 2014-09-05 07:12:46]

Patchset #1 (id:1) has been deleted

[yoichio, 2014-09-05 07:12:52]

Patchset #1 (id:20001) has been deleted

[yosin_UTC9, 2014-09-05 08:06:59]

LGTM

Thanks for follow up!

[ojan, 2014-09-05 17:17:25]

The CQ bit was checked by ojan@chromium.org

[ojan, 2014-09-05 17:17:25]

lgtm

[ojan, 2014-09-05 17:17:51]

Thanks! Can you also email public-webapps and suggest that the spec be changed?

[commit-bot: I haz the power, 2014-09-05 17:17:56]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/yoichio@chromium.org/546703003/40001

[commit-bot: I haz the power, 2014-09-05 23:26:16]

Committed patchset #1 (id:40001) as 181487