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

chrome/browser/ui/android/infobars/confirm_infobar.cc

 // Copyright 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/ui/android/infobars/confirm_infobar.h"
 
 #include <vector>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
@@ skipping 84 matching lines @@
       cvc->GetWindowAndroid()->GetJavaObject();
 
   return Java_ConfirmInfoBarDelegate_showConfirmInfoBar(
       env, java_confirm_delegate_.obj(),
       jwindow_android.obj(), GetEnumeratedIconId(), java_bitmap.obj(),
       message_text.obj(), link_text.obj(), ok_button_text.obj(),
       cancel_button_text.obj(),
       base::android::ToJavaIntArray(env, content_settings).obj());
 }
 
-void ConfirmInfoBar::OnLinkClicked(JNIEnv* env, jobject obj) {
+void ConfirmInfoBar::OnLinkClicked(JNIEnv* env,
+                                   const JavaParamRef<jobject>& obj) {
   if (!owner())
       return; // We're closing; don't call anything, it might access the owner.
 
   if (GetDelegate()->LinkClicked(NEW_FOREGROUND_TAB))
     RemoveSelf();
 }
 
 void ConfirmInfoBar::ProcessButton(int action) {
   if (!owner())
     return; // We're closing; don't call anything, it might access the owner.
@@ skipping 16 matching lines @@
   return (delegate->GetButtons() & button) ?
       delegate->GetButtonLabel(button) : base::string16();
 }
 
 
 // Native JNI methods ---------------------------------------------------------
 
 bool RegisterConfirmInfoBarDelegate(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }