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

chrome/browser/ui/android/infobars/infobar_android.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/infobar_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/android/resource_mapper.h"
@@ skipping 35 matching lines @@
 
 jobject InfoBarAndroid::GetJavaInfoBar() {
   return java_info_bar_.obj();
 }
 
 bool InfoBarAndroid::HasSetJavaInfoBar() const {
   return !java_info_bar_.is_null();
 }
 
 void InfoBarAndroid::OnButtonClicked(JNIEnv* env,
-                                     jobject obj,
+                                     const JavaParamRef<jobject>& obj,
                                      jint action) {
   ProcessButton(action);
 }
 
-void InfoBarAndroid::OnCloseButtonClicked(JNIEnv* env, jobject obj) {
+void InfoBarAndroid::OnCloseButtonClicked(JNIEnv* env,
+                                          const JavaParamRef<jobject>& obj) {
   if (!owner())
     return; // We're closing; don't call anything, it might access the owner.
   delegate()->InfoBarDismissed();
   RemoveSelf();
 }
 
 void InfoBarAndroid::CloseJavaInfoBar() {
   if (!java_info_bar_.is_null()) {
     JNIEnv* env = base::android::AttachCurrentThread();
     Java_InfoBar_closeInfoBar(env, java_info_bar_.obj());
   }
 }
 
 int InfoBarAndroid::GetEnumeratedIconId() {
   return ResourceMapper::MapFromChromiumId(delegate()->GetIconId());
 }
 
 
 // Native JNI methods ---------------------------------------------------------
 
 bool RegisterNativeInfoBar(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }