crosswalk-project/crosswalk — pull request #1513 by takethathe (2014-01-21 05:40:34+00:00)
Title: [Runtime] Enable to update a web application from local 

A web application can be updated from local when using "--install" switch
in command line, like this:
$ xwalk --install /path/to/xpk_package.xpk
If the application has been installed, WRT will try to update it.

https://crosswalk-project.org/jira/browse/XWALK-463