Remove some dependencies of full paths from file_manager.js.

This patch removes dependencies which are not related to app state, and can be safely removed at this stage.

TEST=Tested manually.
BUG=320967

Review URL: https://codereview.chromium.org/146543002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247193 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247193