jni_generator: Pass object parameters as JavaParamRef.

remoting/client/jni/jni_client.cc

 // Copyright 2015 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 "remoting/client/jni/jni_client.h"
 
 #include "jni/Client_jni.h"
 
 namespace remoting {
 
 JniClient::JniClient() {
 }
 
 JniClient::~JniClient() {
 }
 
 // static
 bool JniClient::RegisterJni(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 void JniClient::Destroy(JNIEnv* env, jobject caller) {
   delete this;
 }
 
-static jlong Init(JNIEnv* env, jobject caller) {
+static jlong Init(JNIEnv* env, const JavaParamRef<jobject>& caller) {
   return reinterpret_cast<intptr_t>(new JniClient());
 }
 
 }  // namespace remoting