tree ac8c6d0b73a52de9b4be631d1afa27c93f215de9
parent ee522d4758a5084b46311b802d6791e7e5953c31
author ryoh <ryoh@chromium.org> 1455502459 -0800
committer Commit bot <commit-bot@chromium.org> 1455502531 +0000

introduce a permission without sub-permissions in mediaGalleries API

We use mediaGalleries.getMetadata API to fetch media metadata in our Files.app(Chrome OS FileManager).

We pass the blob object(~binary data) to the API,
so we don't need any permissions.

This API has "read" permission, but this permission means "reading files in the MediaGallery", but we don't read it - the blob objects we pass is from filesystem, not from MediaGallery.

We need "empty" permissions, but if we pass a empty list as permissions, it causes permission error and the app doesn't start at all.

In this patch, I introduce a permission without sub-permissions,
and you can specify this permission in a manifest file like:

> "mediaGalleries",

https://developer.chrome.com/apps/mediaGalleries
BUG=581614

Review URL: https://codereview.chromium.org/1643183002

Cr-Commit-Position: refs/heads/master@{#375400}