Bug 542897 - [OOPP] Random sized black boxes appear/disappear in silverlight content areas. r=bsmedberg.

dom/plugins/PluginInstanceParent.cpp

@@ -552,9 +552,7 @@ PluginInstanceParent::NPP_HandleEvent(void* event)
             {
                 RECT rect;
                 SharedSurfaceBeforePaint(rect, npremoteevent);
-                if (!CallNPP_HandleEvent(npremoteevent, &handled))
-                    return 0;
-                if (handled)
+                CallNPP_HandleEvent(npremoteevent, &handled);
                 SharedSurfaceAfterPaint(npevent);
             }
             break;