Remove unused argument.

git-svn-id: http://izanagi.googlecode.com/svn/trunk@597 05d2ca3c-aac1-175a-b4cf-4be6c0a525a7
Rename arguments.

git-svn-id: http://izanagi.googlecode.com/svn/trunk@598 05d2ca3c-aac1-175a-b4cf-4be6c0a525a7