Revert of "Call the Close() event on a Notification when it's being replaced."

Revert of "Call the Close() event on a Notification when it's being replaced."

This patch unintentionally also changed behavior of the Chrome Apps
Notification API. Revert for now, and figure out whether we should
actually want this.

BUG=366098, 440256
Committed: https://crrev.com/67c6ae276fa27a8cb47cc221dc487eb55cd3c15e
Cr-Commit-Position: refs/heads/master@{#308152}

[Peter Beverloo, 2014-12-12 18:27:04]

peter@chromium.org changed reviewers:
+ mukai@chromium.org

[Jun Mukai, 2014-12-12 18:29:01]

lgtm.  Sorry for this.

Next time you may want to write a test case that it happens only with web
notifications...

[Peter Beverloo, 2014-12-12 18:31:02]

The CQ bit was checked by peter@chromium.org

[commit-bot: I haz the power, 2014-12-12 18:32:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/802753002/1

[Peter Beverloo, 2014-12-12 18:36:09]

On 2014/12/12 18:29:01, Jun Mukai wrote:
> lgtm.  Sorry for this.
> 
> Next time you may want to write a test case that it happens only with web
> notifications...

Yes, this is my bad, sorry for missing this!

[commit-bot: I haz the power, 2014-12-12 20:32:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-12 20:34:07]

Patchset 1 (id:??) landed as
https://crrev.com/67c6ae276fa27a8cb47cc221dc487eb55cd3c15e
Cr-Commit-Position: refs/heads/master@{#308152}