FileSystem API &
===

I've got some troubles with my new ChromeApp.

So.. I've started using JavaScript FileSystem API, so i
use it to create mp3 files (my app is a html5 player).

The FileEntry object from the FileSystem API gives the `toURL()` method
for files which are stored in filesystem. In the ChormeApps this method
returns something like this:

    filesystem:chrome-extension://mhldgbaidgpagmimniipggmajbodaeco/persistent/cbd416046ae7a567d4629fc38ac80864.mp3

But when i trying to use this url in `<audio>` tag as value for `src` attribute
i getting this error:

    Refused to load media from 'filesystem:chrome-extension://mhldgbaidgpagmimniipggmajbodaeco/persistent/cbd416046ae7a567d4629fc38ac80864.mp3' because of Content-Security-Policy.

So i tried to use clear name with relative path

    <audio src="cbd416046ae7a567d4629fc38ac80864.mp3" />

and with Chrome App root path

    <audio src="chrome-extension://mhldgbaidgpagmimniipggmajbodaeco/cbd416046ae7a567d4629fc38ac80864.mp3"/>

and with "persistent" folder

    <audio src="chrome-extension://mhldgbaidgpagmimniipggmajbodaeco/persistent/cbd416046ae7a567d4629fc38ac80864.mp3"/>

In last 3 cases i've got 404 error.
So, how can i enable loading media from filesystem? Something in the manifest in the  `content_security_policy` or maybe in the `permissions`? Or there is some magical path to use?

Thanks in advance for your answers.