undo accidental changes

The wash initial commit made some unintentional changes in nassh/.
This undoes them.

Change-Id: I75af512c3d2d4fcbcf22b591af1c1356ff97de17
Reviewed-on: https://chromium-review.googlesource.com/175994
Reviewed-by: Robert Ginda <rginda@chromium.org>
Tested-by: Robert Ginda <rginda@chromium.org>
Fix packaged-app check in hterm.js

The current test for whether hterm is running as a packaged app checks
"chrome" and "chrome.runtime", but these seem to be defined when I
tested on Chrome 32 via a localhost server.

This change adds an additional test for "chrome.runtime.getManifest".

Change-Id: I0c3b62fb014ed0ee9ead67e58513c8b268641eb5
Reviewed-on: https://chromium-review.googlesource.com/175991
Reviewed-by: Robert Ginda <rginda@chromium.org>
Commit-Queue: Ben Smith <binji@chromium.org>
Tested-by: Ben Smith <binji@chromium.org>