Add a unified resource tracker shared between the proxy and the impl.

webkit/plugins/ppapi/ppb_video_layer_impl.cc

Index: webkit/plugins/ppapi/ppb_video_layer_impl.cc
diff --git a/webkit/plugins/ppapi/ppb_video_layer_impl.cc b/webkit/plugins/ppapi/ppb_video_layer_impl.cc
index 1782109933002455283c0300a2766695ec92852d..e7cad6fe2d7b5d8284f593ac045ead8864eea515 100644
--- a/webkit/plugins/ppapi/ppb_video_layer_impl.cc
+++ b/webkit/plugins/ppapi/ppb_video_layer_impl.cc
@@ -25,10 +25,7 @@ PP_Resource PPB_VideoLayer_Impl::Create(PluginInstance* instance,
                                         PP_VideoLayerMode_Dev mode) {
   if (mode != PP_VIDEOLAYERMODE_SOFTWARE)
     return 0;
-
-  scoped_refptr<PPB_VideoLayer_Impl> layer(
-      new PPB_VideoLayer_Software(instance));
-  return layer->GetReference();
+  return (new PPB_VideoLayer_Software(instance))->GetReference();
 }
 
 PPB_VideoLayer_API* PPB_VideoLayer_Impl::AsPPB_VideoLayer_API() {