Use "bad password" as error message when entering bad wifi passord.

Replace the string "Bad passphrase" with "Bad password"

BUG=340674
R=oshima@chromium.org

Review URL: https://codereview.chromium.org/149373003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249346 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249346