jni_generator: Pass object parameters as JavaParamRef.

base/android/cpu_features.cc

 // Copyright (c) 2012 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 <cpu-features.h>
 
 #include "base/android/jni_android.h"
 #include "jni/CpuFeatures_jni.h"
 
 namespace base {
 namespace android {
 
-jint GetCoreCount(JNIEnv*, jclass) {
+jint GetCoreCount(JNIEnv*, const JavaParamRef<jclass>&) {
   return android_getCpuCount();
 }
 
-jlong GetCpuFeatures(JNIEnv*, jclass) {
+jlong GetCpuFeatures(JNIEnv*, const JavaParamRef<jclass>&) {
   return android_getCpuFeatures();
 }
 
 bool RegisterCpuFeatures(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace base