Stop passing Chrome OS file dialog title resource to Files.app.

They are not used.

BUG=321497

Review URL: https://codereview.chromium.org/77693003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236225 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236225