jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/search_engines/template_url_service_android.cc

 // Copyright (c) 2013 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 "chrome/browser/search_engines/template_url_service_android.h"
 
 #include "base/android/jni_string.h"
 #include "base/bind.h"
 #include "base/format_macros.h"
 #include "base/strings/stringprintf.h"
@@ skipping 239 matching lines @@
     JNIEnv* env,
     jobject obj,
     jint index) {
   TemplateURL* template_url = template_url_service_->GetTemplateURLs()[index];
   std::string url(template_url->url_ref().ReplaceSearchTerms(
       TemplateURLRef::SearchTermsArgs(
           base::ASCIIToUTF16("query")), SearchTermsData(), nullptr));
   return base::android::ConvertUTF8ToJavaString(env, url);
 }
 
-static jlong Init(JNIEnv* env, jobject obj) {
+static jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   TemplateUrlServiceAndroid* template_url_service_android =
       new TemplateUrlServiceAndroid(env, obj);
   return reinterpret_cast<intptr_t>(template_url_service_android);
 }
 
 // static
 bool TemplateUrlServiceAndroid::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }