jni_generator: Pass object parameters as JavaParamRef.

sync/android/model_type_helper.cc

Index: sync/android/model_type_helper.cc
diff --git a/sync/android/model_type_helper.cc b/sync/android/model_type_helper.cc
index 37650cbdf39d102912717103656e357846c34f4c..64d808fbd0f25d06ebeb709935fafa1c0aa3e166 100644
--- a/sync/android/model_type_helper.cc
+++ b/sync/android/model_type_helper.cc
@@ -11,8 +11,10 @@
 
 namespace syncer {
 
-static ScopedJavaLocalRef<jstring>
-ModelTypeToNotificationType(JNIEnv* env, jclass clazz, jint model_type_int) {
+static ScopedJavaLocalRef<jstring> ModelTypeToNotificationType(
+    JNIEnv* env,
+    const JavaParamRef<jclass>& clazz,
+    jint model_type_int) {
   std::string model_type_string;
   ModelType model_type = static_cast<ModelType>(model_type_int);
   if (!RealModelTypeToNotificationType(model_type, &model_type_string)) {