Added "Notifications Galore!" notification test app.

This demo app is for testing the notifications API, and for easily generating screenshots of different templates.

BUG=NONE

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=180909

[dharcourt, 2013-02-05 20:51:19]

Hi Mike,

This is an all-copyrighted-content-removes-so-it-can-be-checked-in version of
the Notifications Galore! test app we've been using for a bit. This app has a
lot of images so once it LGTY I'll get to practice my newly found committerness
by manually checking in those binary files.

Thanks for the review!

    - Charles

[dharcourt, 2013-02-05 20:51:50]

On 2013/02/05 20:51:19, dharcourt wrote:
> Hi Mike,
> 
> This is an all-copyrighted-content-removes-so-it-can-be-checked-in version of
> the Notifications Galore! test app we've been using for a bit. This app has a
> lot of images so once it LGTY I'll get to practice my newly found
committerness
> by manually checking in those binary files.
> 
> Thanks for the review!
> 
>     - Charles

s/removes/removed/g.

[miket_OOO, 2013-02-05 22:29:42]

Rubber-stamp LGTM