jni_generator: Pass object parameters as JavaParamRef.

base/android/application_status_listener.cc

Index: base/android/application_status_listener.cc
diff --git a/base/android/application_status_listener.cc b/base/android/application_status_listener.cc
index 3e6fbf833ceb98e8bca020750ce078b34eba34b8..5aee781faabcc1cd206ca4fc012000d862ab68f5 100644
--- a/base/android/application_status_listener.cc
+++ b/base/android/application_status_listener.cc
@@ -66,7 +66,7 @@ void ApplicationStatusListener::NotifyApplicationStateChange(
 }
 
 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);