jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/after_startup_task_utils_android.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/after_startup_task_utils_android.h"
 
 #include "chrome/browser/after_startup_task_utils.h"
 #include "jni/AfterStartupTaskUtils_jni.h"
 
 namespace android {
 
 class AfterStartupTaskUtilsJNI {
  public:
   static void SetBrowserStartupIsComplete() {
     AfterStartupTaskUtils::SetBrowserStartupIsComplete();
   }
 };
 
 }  // android
 
-static void SetStartupComplete(JNIEnv* env, jclass obj) {
+static void SetStartupComplete(JNIEnv* env, const JavaParamRef<jclass>& obj) {
   android::AfterStartupTaskUtilsJNI::SetBrowserStartupIsComplete();
 }
 
 bool RegisterAfterStartupTaskUtilsJNI(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }