Reviewed by Darin Adler.

    Reviewed by Darin Adler.

        <rdar://problem/4688618> REGRESSION(10.4.7-9A241): JMol java applet fails in Safari not Firefox

        No layout test for now because Java doesn't work in DumpRenderTree.

        * Plugins/WebPluginDatabase.m:
        (-[WebPluginDatabase refresh]):
        Add each plug-in MIME type to registeredMIMETypes, even if we don't register a document view class for the
        MIME type.  This fixes -[WebPluginDatabase isMIMETypeRegistered:] and thus fallback content for Java applets
        (we were always rendering fallback content, if any, for Java applets).

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@16101 268f45cc-cd09-0410-ab3c-d52691b4dbfc