jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/search_engines/template_url_service_android.cc

Index: chrome/browser/search_engines/template_url_service_android.cc
diff --git a/chrome/browser/search_engines/template_url_service_android.cc b/chrome/browser/search_engines/template_url_service_android.cc
index ec59259746309745e1505452e2196b8b54a8d36d..b157f89e2088ff981225460c4de229d139b09dcf 100644
--- a/chrome/browser/search_engines/template_url_service_android.cc
+++ b/chrome/browser/search_engines/template_url_service_android.cc
@@ -257,7 +257,7 @@ TemplateUrlServiceAndroid::GetSearchEngineUrlFromTemplateUrl(
   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);