Bug 624165 Cleanup plugins code, remove kill MOZ_COMPOSITED_PLUGINS and MOZ_USE_IMAGE_EXPOSE r=dougt

dom/plugins/base/nsPluginNativeWindow.h

@@ -104,15 +104,6 @@ public:
     SetPluginInstance(aPluginInstance);
     return NS_OK;
   }
-#if (MOZ_PLATFORM_MAEMO == 5) && defined(MOZ_WIDGET_GTK2)
-#define MOZ_COMPOSITED_PLUGINS
-#endif
-#ifdef MOZ_COMPOSITED_PLUGINS
-  /* XXX: we use this to leak the socket widget out from nsPlugNativeWindowGtk2
-     so that Renderer::NativeDraw() in nsObjectFrame.cpp can draw the widget.
-     I don't currently know a better way to do this... */
-  void *mPlugWindow;
-#endif
 
 protected:
   nsRefPtr<nsNPAPIPluginInstance> mPluginInstance;