jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/android/compositor/layer_title_cache.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/android/compositor/layer_title_cache.h"
 
 #include <android/bitmap.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/layers/layer.h"
@@ skipping 91 matching lines @@
 
 bool RegisterLayerTitleCache(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 // ----------------------------------------------------------------------------
 // Native JNI methods
 // ----------------------------------------------------------------------------
 
 jlong Init(JNIEnv* env,
-           jobject obj,
+           const JavaParamRef<jobject>& obj,
            jint fade_width,
            jint favicon_start_padding,
            jint favicon_end_padding,
            jint spinner_resource_id,
            jint spinner_incognito_resource_id) {
   LayerTitleCache* cache = new LayerTitleCache(
       env, obj, fade_width, favicon_start_padding, favicon_end_padding,
       spinner_resource_id, spinner_incognito_resource_id);
   return reinterpret_cast<intptr_t>(cache);
 }
 
 }  // namespace android
 }  // namespace chrome