jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/android/new_tab_page_prefs.cc

Index: chrome/browser/android/new_tab_page_prefs.cc
diff --git a/chrome/browser/android/new_tab_page_prefs.cc b/chrome/browser/android/new_tab_page_prefs.cc
index 0bb054d95ac48d80cd1c555a309ed6c0c7042ffb..d22d6fb46f294b4564ba9d9e9c16da0ebc5c30ad 100644
--- a/chrome/browser/android/new_tab_page_prefs.cc
+++ b/chrome/browser/android/new_tab_page_prefs.cc
@@ -16,7 +16,9 @@
 
 using base::android::ConvertJavaStringToUTF8;
 
-static jlong Init(JNIEnv* env, jclass clazz, jobject profile) {
+static jlong Init(JNIEnv* env,
+                  const JavaParamRef<jclass>& clazz,
+                  const JavaParamRef<jobject>& profile) {
   NewTabPagePrefs* new_tab_page_prefs =
       new NewTabPagePrefs(ProfileAndroid::FromProfileAndroid(profile));
   return reinterpret_cast<intptr_t>(new_tab_page_prefs);