Reviewed by Darin.

    Reviewed by Darin.

	<rdar://problem/4060020> Add stub version of security SPI for QuickTime plug-in so QuickTime team has something to compile and link against

	* Plugins.subproj/WebPluginContainerPrivate.h: Added.
        * Plugins.subproj/WebPluginController.m:
        (-[WebPluginController _webPluginContainerCheckIfAllowedToLoadRequest:inFrame:resultObject:selector:]):
        (-[WebPluginController _webPluginContainerCancelCheckIfAllowedToLoadRequest:]):
        * WebKit.pbproj/project.pbxproj:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8945 268f45cc-cd09-0410-ab3c-d52691b4dbfc