jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/dom_distiller/dom_distiller_service_factory_android.cc

 // Copyright 2014 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/dom_distiller/dom_distiller_service_factory_android.h"
 
 #include "base/android/jni_android.h"
 #include "chrome/browser/dom_distiller/dom_distiller_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_android.h"
@@ skipping 14 matching lines @@
           ProfileAndroid::FromProfileAndroid(j_profile));
   DomDistillerServiceAndroid* service_android =
       new DomDistillerServiceAndroid(service);
   return ScopedJavaLocalRef<jobject>(service_android->java_ref_);
 }
 
 bool DomDistillerServiceFactoryAndroid::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
-ScopedJavaLocalRef<jobject> GetForProfile(JNIEnv* env,
-                                          jclass clazz,
-                                          jobject j_profile) {
+ScopedJavaLocalRef<jobject> GetForProfile(
+    JNIEnv* env,
+    const JavaParamRef<jclass>& clazz,
+    const JavaParamRef<jobject>& j_profile) {
   return DomDistillerServiceFactoryAndroid::GetForProfile(env, clazz,
                                                           j_profile);
 }
 
 }  // namespace android
 }  // namespace dom_distiller