jni: Pass method parameters as JavaParamRef in chrome/browser/ui.

chrome/browser/ui/android/infobars/save_password_infobar.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 "chrome/browser/ui/android/infobars/save_password_infobar.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "jni/SavePasswordInfoBar_jni.h"
 
@@ skipping 21 matching lines @@
       ConvertUTF16ToJavaString(
           env, save_password_delegate->GetFirstRunExperienceMessage());
 
   return Java_SavePasswordInfoBar_show(
       env, GetEnumeratedIconId(), message_text.obj(),
       save_password_delegate->message_link_range().start(),
       save_password_delegate->message_link_range().end(), ok_button_text.obj(),
       cancel_button_text.obj(), first_run_experience_message.obj());
 }
 
-void SavePasswordInfoBar::OnLinkClicked(JNIEnv* env, jobject obj) {
+void SavePasswordInfoBar::OnLinkClicked(JNIEnv* env,
+                                        const JavaParamRef<jobject>& obj) {
   GetDelegate()->LinkClicked(NEW_FOREGROUND_TAB);
 }
 
 bool SavePasswordInfoBar::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 scoped_ptr<infobars::InfoBar> CreateSavePasswordInfoBar(
     scoped_ptr<SavePasswordInfoBarDelegate> delegate) {
   return make_scoped_ptr(new SavePasswordInfoBar(delegate.Pass()));
 }