ozone: demo: Add software support & use message loop

ozone: demo: Add software support & use message loop

This sample app is useful for testing but doesn't have software support.
Add it and use it when we can't initalize GL.

Also, fix the app to not block the message loop indefinitely. We can
render on a task and let other work (event processing) continue.

BUG=none
TEST=ozone_demo on egltest, caca
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=285342

[spang, 2014-07-24 17:00:51]

should probably use better vsync technology

[dnicoara, 2014-07-24 17:12:04]

lgtm

https://codereview.chromium.org/416893002/diff/1/ui/ozone/demo/ozone_demo.cc
File ui/ozone/demo/ozone_demo.cc (right):

https://codereview.chromium.org/416893002/diff/1/ui/ozone/demo/ozone_demo.cc#...
ui/ozone/demo/ozone_demo.cc:55: LOG(ERROR) << "failed to create drawing
surface";
nit: Could we have all the messages formatted consistently (Start with capital
letters, end with periods).

[alexst (slow to review), 2014-07-24 17:21:22]

lgtm, modulo comments in main()

[spang, 2014-07-24 17:39:14]

https://codereview.chromium.org/416893002/diff/1/ui/ozone/demo/ozone_demo.cc
File ui/ozone/demo/ozone_demo.cc (right):

https://codereview.chromium.org/416893002/diff/1/ui/ozone/demo/ozone_demo.cc#...
ui/ozone/demo/ozone_demo.cc:55: LOG(ERROR) << "failed to create drawing
surface";
On 2014/07/24 17:12:03, dnicoara wrote:
> nit: Could we have all the messages formatted consistently (Start with capital
> letters, end with periods).

Done.

[spang, 2014-07-24 18:44:32]

The CQ bit was checked by spang@chromium.org

[commit-bot: I haz the power, 2014-07-24 18:46:24]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/spang@chromium.org/416893002/60001

[commit-bot: I haz the power, 2014-07-24 18:48:47]

Change committed as 285342