Add the Blink APIs for the WebNotificationManager.

Add the Blink APIs for the WebNotificationManager.

The WebNotificationManager is analogous to the WebNotificationPresenter
living in public/web/, but without any dependency on RenderView or
RenderFrames. It also splits up the concept of the data associated with
a notification and the delegate allowing the embedder to interact with
it, as it will soon become possible for the embedder to trigger creation
of Notification objects as well (for event delivery in Service Workers).

BUG=392187
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=184306

[Peter Beverloo, 2014-10-23 13:55:10]

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

[Peter Beverloo, 2014-10-23 13:55:11]

PTAL

Full patches which I'm splitting up can be seen here:
  Blink: https://codereview.chromium.org/624033003/
  Chromium: https://codereview.chromium.org/626973002/

[Mike West, 2014-10-23 14:03:10]

Makes sense to me. Thanks for putting together a design doc. 

Have you shared it with blink-dev? It's probably worth an intent to ship.

[Peter Beverloo, 2014-10-23 16:35:20]

On 2014/10/23 14:03:10, Mike West wrote:
> Makes sense to me. Thanks for putting together a design doc. 
> 
> Have you shared it with blink-dev? It's probably worth an intent to ship.

I just shared the Intent to Implement here:
    https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/AqIGfI3Pv68

[Mike West, 2014-10-23 16:42:34]

On 2014/10/23 16:35:20, Peter Beverloo wrote:
> On 2014/10/23 14:03:10, Mike West wrote:
> > Makes sense to me. Thanks for putting together a design doc. 
> > 
> > Have you shared it with blink-dev? It's probably worth an intent to ship.
> 
> I just shared the Intent to Implement here:
>    
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/AqIGfI3Pv68

LGTM.

I'll look at the other CLs tonight, once I get the kids in bed.

[Peter Beverloo, 2014-10-23 21:51:07]

The CQ bit was checked by peter@chromium.org

[commit-bot: I haz the power, 2014-10-23 21:52:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/672183003/20001

[commit-bot: I haz the power, 2014-10-23 22:57:20]

Committed patchset #2 (id:20001) as 184306