Update PlayCanvas screenshot and description.

Update PlayCanvas screenshot and description.

NOTRY=true
R=rockot@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=276675

[scheib, 2014-06-11 22:06:54]

Preview:

https://chrome-apps-doc.appspot.com/_patch/328233002/apps/game_engines

[Ken Rockot(use gerrit already), 2014-06-11 22:12:21]

lgtm

[scheib, 2014-06-12 00:03:16]

The CQ bit was checked by scheib@chromium.org

[commit-bot: I haz the power, 2014-06-12 00:04:18]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/scheib@chromium.org/328233002/1

[commit-bot: I haz the power, 2014-06-12 04:15:24]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-06-12 04:15:25]

Failed to request the patch to try. Please note that binary files are still
unsupported at the moment, this is being worked on.

Thanks for your patience.

Transient error: Can't process patch for file
chrome/common/extensions/docs/static/images/playcanvas_designer2.png.
Binary file is empty. Maybe the file wasn't uploaded in the first place?

[scheib, 2014-06-12 14:34:49]

Committed patchset #1 manually as r276675 (presubmit successful).