Convert the PluginResource to be refcounted.

ppapi/proxy/ppb_flash_tcp_socket_proxy.cc

Index: ppapi/proxy/ppb_flash_tcp_socket_proxy.cc
diff --git a/ppapi/proxy/ppb_flash_tcp_socket_proxy.cc b/ppapi/proxy/ppb_flash_tcp_socket_proxy.cc
index 6a6ab50e9411898b93633fcda7bd5468f023aeac..c474ed00dd92e46d1e889b792c037cad2e92087a 100644
--- a/ppapi/proxy/ppb_flash_tcp_socket_proxy.cc
+++ b/ppapi/proxy/ppb_flash_tcp_socket_proxy.cc
@@ -9,7 +9,6 @@
 #include <map>
 
 #include "base/logging.h"
-#include "base/memory/linked_ptr.h"
 #include "base/message_loop.h"
 #include "base/scoped_ptr.h"
 #include "base/task.h"
@@ -375,9 +374,8 @@ PP_Resource PPB_Flash_TCPSocket_Proxy::CreateProxyResource(
   if (socket_id == 0)
     return 0;
 
-  linked_ptr<FlashTCPSocket> object(new FlashTCPSocket(
-      HostResource::MakeInstanceOnly(instance), socket_id));
-  return PluginResourceTracker::GetInstance()->AddResource(object);
+  return PluginResourceTracker::GetInstance()->AddResource(
+      new FlashTCPSocket(HostResource::MakeInstanceOnly(instance), socket_id));
 }
 
 bool PPB_Flash_TCPSocket_Proxy::OnMessageReceived(const IPC::Message& msg) {