Don't have svn ls block waiting for password
Don't have svn ls block waiting for password

If user is unauthenticated, svn ls would just hang waiting at
"Password for 'User':", now it'll correctly fail with
"svn: Can't get password".

R=iannucci@chromium.org
BUG=323300,346472

Review URL: https://codereview.chromium.org/178763003

git-svn-id: bd64dd6fa6f3f0ed0c0666d1018379882b742947@253004 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

svn2github/chromium-depot-tools,svn2github/chromium-depot-tools,svn2github/chromium-depot-tools