Make sure that scoped_ptr<> cannot be used with ref-counted objects.

ppapi/proxy/ppb_network_monitor_private_proxy.cc

Index: ppapi/proxy/ppb_network_monitor_private_proxy.cc
diff --git a/ppapi/proxy/ppb_network_monitor_private_proxy.cc b/ppapi/proxy/ppb_network_monitor_private_proxy.cc
index 4fa2d6eec240fd16cd8c7ff12e8cbd5d5cd5a93c..26252acd27e4fff13c4b9a3f3dd2500222c923b3 100644
--- a/ppapi/proxy/ppb_network_monitor_private_proxy.cc
+++ b/ppapi/proxy/ppb_network_monitor_private_proxy.cc
@@ -82,7 +82,7 @@ PP_Resource PPB_NetworkMonitor_Private_Proxy::CreateProxyResource(
   if (!proxy)
     return 0;
 
-  scoped_ptr<NetworkMonitor> result(
+  scoped_refptr<NetworkMonitor> result(
       new NetworkMonitor(instance, proxy, callback, user_data));
   proxy->monitors_->AddObserver(result.get());
 
@@ -103,7 +103,7 @@ PP_Resource PPB_NetworkMonitor_Private_Proxy::CreateProxyResource(
         result->AsWeakPtr(), proxy->current_list_));
   }
 
-  return result.release()->GetReference();
+  return result->GetReference();
 }
 
 bool PPB_NetworkMonitor_Private_Proxy::OnMessageReceived(