Talked to stevenjb@ just now. I support moving this code back to //ash.

The network code in //ui/chromeos was moved there for athena, which needed networking UI but couldn't depend on //chrome or //ash. Athena doesn't exist anymore, so we don't need a separate //ui/chromeos.

See https://codereview.chromium.org/351353004 for a bit of history.

Long term we want chromeos chrome to be like linux chrome, and not have ash dependencies. That day is a long time away, however. Even if we break the code dependency, we could still share the art assets if we needed them for webui in chrome.

Consider moving the code into //ash/common/system/chromeos/network, unless the code is non-chromeos-specific.  (Our project builds ash on windows for test/debugging.)