Web Notifications should always reappear as popups when updated.

Web Notifications should always reappear as popups when updated.

The message center already does this for notifications with a higher
priority than the notification they replace, but this makes it explicit
for Web Notifications (which cannot indicate priority).

TBR=dewittj (reviewed in cl 301713002)
BUG=366102
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=287682

[Peter Beverloo, 2014-08-02 15:45:33]

Same as 301713002, but without enabling the test which does leak memory. I'll
fix that separately.

TBR because it's the same patch.

[Peter Beverloo, 2014-08-02 15:45:35]

The CQ bit was checked by peter@chromium.org

[commit-bot: I haz the power, 2014-08-02 15:46:26]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/peter@chromium.org/439073002/1

[Peter Beverloo, 2014-08-02 16:01:03]

The CQ bit was unchecked by peter@chromium.org

[Peter Beverloo, 2014-08-05 20:00:10]

The CQ bit was checked by peter@chromium.org

[commit-bot: I haz the power, 2014-08-05 20:01:36]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/peter@chromium.org/439073002/20001

[commit-bot: I haz the power, 2014-08-06 00:11:02]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tri...)
  linux_chromium_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[commit-bot: I haz the power, 2014-08-06 05:37:01]

Change committed as 287682