Fix Crash Due to Programmatic Dismissal of a Notification.

Fix Crash Due to Programmatic Dismissal of a Notification.

The notification dismissal was reported as from a user, which is not the case when the notification is dismissed programmatically.

BUG=368405
R=dewittj@chromium.org, robliao@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266956

[robliao, 2014-04-29 19:52:31]

lgtm

[skare_, 2014-04-29 20:00:06]

+dewittj for OWNERS

[dewittj, 2014-04-29 20:33:00]

nit: better issue description for more commit message love.  And bug #.

Other than that, lgtm

[robliao, 2014-04-29 20:33:47]

On 2014/04/29 20:33:00, dewittj wrote:
> nit: better issue description for more commit message love.  And bug #.
> 
> Other than that, lgtm

I'll set the bug up

[robliao, 2014-04-29 20:40:36]

Updated the Changelist Description

[robliao, 2014-04-29 20:46:03]

On 2014/04/29 20:40:36, robliao wrote:
> Updated the Changelist Description

D:\src>out\Debug\unit_tests.exe --single-process-tests
--gtest_filter=ExtensionWelcome*

[==========] 12 tests from 1 test case ran. (986 ms total)
[  PASSED  ] 12 tests.

[robliao, 2014-04-29 20:49:54]

Committed patchset #1 manually as r266956 (presubmit successful).