Reviewed by John.

    Reviewed by John.

	<rdar://problem/3879226> WebKit needlessly uses extra memory to store icon refcounts as NSNumbers

	* Misc.subproj/WebIconDatabase.m:
        (-[WebIconDatabase init]):
        (-[WebIconDatabase _setIconURL:forURL:]):
        (-[WebIconDatabase _retainIconForIconURLString:]):
        (-[WebIconDatabase _releaseIconForIconURLString:]):
        (-[WebIconDatabase _retainFutureIconForURL:]):
        (-[WebIconDatabase _releaseFutureIconForURL:]):
        * Misc.subproj/WebIconDatabasePrivate.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8005 268f45cc-cd09-0410-ab3c-d52691b4dbfc