Convert the PluginResource to be refcounted.

ppapi/proxy/ppb_file_ref_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_file_ref_proxy.h"
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_file_ref.h"
 #include "ppapi/c/private/ppb_proxy_private.h"
 #include "ppapi/proxy/enter_proxy.h"
@@ skipping 210 matching lines @@
   result->name = SerializedVarReturnValue::Convert(dispatcher(),
                                                    enter.object()->GetName());
 }
 
 // static
 PP_Resource PPB_FileRef_Proxy::DeserializeFileRef(
     const PPBFileRef_CreateInfo& serialized) {
   if (serialized.resource.is_null())
     return 0;  // Resource invalid.
 
-  linked_ptr<FileRef> object(new FileRef(serialized));
-  return PluginResourceTracker::GetInstance()->AddResource(object);
+  return PluginResourceTracker::GetInstance()->AddResource(
+      new FileRef(serialized));
 }
 
 void PPB_FileRef_Proxy::OnMsgCreate(const HostResource& file_system,
                                     const std::string& path,
                                     PPBFileRef_CreateInfo* result) {
   EnterFunctionNoLock<ResourceCreationAPI> enter(file_system.instance(), true);
   if (enter.failed())
     return;
   PP_Resource resource = enter.functions()->CreateFileRef(
       file_system.host_resource(), path.c_str());
@@ skipping 53 matching lines @@
     return;
   PP_CompletionCallback callback = ReceiveCallback(serialized_callback);
   int32_t result = enter.object()->Rename(new_file_ref.host_resource(),
                                           callback);
   if (result != PP_OK_COMPLETIONPENDING)
     PP_RunCompletionCallback(&callback, result);
 }
 
 }  // namespace proxy
 }  // namespace pp