Incorrect usage of _PathSource for command line argument paths.  Fixing in SVN so that this is fixed externally quickly (where it is used).
Incorrect usage of _PathSource for command line argument paths.  Fixing
in SVN so that this is fixed externally quickly (where it is used).

See discussion:
https://groups.google.com/group/closure-library-discuss/browse_thread/thread/efae65a3f5ce36f3



git-svn-id: 35241bd708fe29f1f6c7a4322d322e99ff93b95e@748 0b95b8e8-c90f-11de-9d4f-f947ee5921c8

knutwalker/google-closure-library,Kuniwak/google-closure-library-jsdoc,KgDesignes/closure-library,prop/closure-library,homer6/google-closure-library,jarib/google-closure-library,homer6/google-closure-library,thinkfuse/google-closure,rethinkdb/google-closure-library,homer6/google-closure-library,KgDesignes/closure-library,Kuniwak/google-closure-library-jsdoc,thinkfuse/google-closure,rethinkdb/google-closure-library,prop/closure-library,neilrahilly/closure-library,neilrahilly/closure-library,thinkfuse/google-closure,jarib/google-closure-library,knutwalker/google-closure-library,neilrahilly/closure-library,KgDesignes/closure-library,prop/closure-library,rethinkdb/google-closure-library