Fixed: <rdar://problem/5586978> REGRESSION (Safari 2-3): WebKit sometimes doesn't invoke Flash's NPP_SetWindow function and causes a hang

        The CG-based Flash player would sometimes hang because (for CoreGraphics-based plug-ins) our code would only call into the NPP_SetWindow()
        function when we tell the plug-in to draw. This created havoc with Flash because Flash expects the browser to call NPP_SetWindow()
        and provide a valid graphics context regardless of whether or not it actually needs to draw. 
        
        * Plugins/WebBaseNetscapePluginView.mm:
        (-[WebBaseNetscapePluginView saveAndSetNewPortStateForUpdate:]): Removed an incorrect comment and toned down an ASSERT that was too strict. 
        (-[WebBaseNetscapePluginView updateAndSetWindow]): Removed an early return for CoreGraphics-based plug-ins which would sometimes 
        altogether prevent updating the PortState and calling into a plug-ins NPP_SetWindow() function.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@28359 268f45cc-cd09-0410-ab3c-d52691b4dbfc