jni_generator: Pass object parameters as JavaParamRef.

base/android/record_user_action.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 "base/android/record_user_action.h"
 
 #include "base/android/jni_string.h"
 #include "base/metrics/user_metrics.h"
 #include "jni/RecordUserAction_jni.h"
 
 namespace base {
 namespace android {
 
-static void RecordUserAction(JNIEnv* env, jclass clazz, jstring j_action) {
+static void RecordUserAction(JNIEnv* env,
+                             const JavaParamRef<jclass>& clazz,
+                             const JavaParamRef<jstring>& j_action) {
   RecordComputedAction(ConvertJavaStringToUTF8(env, j_action));
 }
 
 // Register native methods
 bool RegisterRecordUserAction(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace base