Update resource download for webrtc.DEPS

Update resource download for webrtc.DEPS

This is needed as we've now moved over to use
the download_from_google_storage.py script in
depot tools for downloading our resource files.

TEST=local edit and gclient sync successfully downloaded
the files into the right directory.
BUG=webrtc:2294
R=phoglund@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=233585

[kjellander_chromium, 2013-11-06 20:41:41]

This is needed before we can drop the call to the old update_resources.py script
that is called from
https://code.google.com/p/chromium/codesearch#chromium/src/build/android/buil...
for the Android bots.

[phoglund_chromium, 2013-11-07 09:59:10]

lgtm

[kjellander_chromium, 2013-11-07 11:52:39]

Committed patchset #1 manually as r233585 (presubmit successful).