Convert the PluginResource to be refcounted.

ppapi/proxy/ppb_audio_config_proxy.cc

 // Copyright (c) 2011 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 "ppapi/proxy/ppb_audio_config_proxy.h"
 
 #include "ppapi/c/ppb_audio_config.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/plugin_resource.h"
 #include "ppapi/proxy/ppapi_messages.h"
@@ skipping 56 matching lines @@
     &CreateAudioConfigProxy,
   };
   return &info;
 }
 
 // static
 PP_Resource PPB_AudioConfig_Proxy::CreateProxyResource(
     PP_Instance instance,
     PP_AudioSampleRate sample_rate,
     uint32_t sample_frame_count) {
-  linked_ptr<AudioConfig> object(new AudioConfig(
+  scoped_refptr<AudioConfig> object(new AudioConfig(
       HostResource::MakeInstanceOnly(instance)));
   if (!object->Init(sample_rate, sample_frame_count))
     return 0;
   return PluginResourceTracker::GetInstance()->AddResource(object);
 }
 
 bool PPB_AudioConfig_Proxy::OnMessageReceived(const IPC::Message& msg) {
   // There are no IPC messages for this interface.
   NOTREACHED();
   return false;
 }
 
 }  // namespace proxy
 }  // namespace pp