jni_generator: Pass object parameters as JavaParamRef.

base/android/application_status_listener.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/android/application_status_listener.h"
 
 #include <jni.h>
 
 #include "base/lazy_instance.h"
 #include "base/observer_list_threadsafe.h"
@@ skipping 48 matching lines @@
 }
 
 // static
 void ApplicationStatusListener::NotifyApplicationStateChange(
     ApplicationState state) {
   g_observers.Get().Notify(FROM_HERE, &ApplicationStatusListener::Notify,
                            state);
 }
 
 static void OnApplicationStateChange(JNIEnv* env,
-                                     jclass clazz,
+                                     const JavaParamRef<jclass>& clazz,
                                      jint new_state) {
   ApplicationState application_state = static_cast<ApplicationState>(new_state);
   ApplicationStatusListener::NotifyApplicationStateChange(application_state);
 }
 
 }  // namespace android
 }  // namespace base