Add a unified resource tracker shared between the proxy and the impl.

webkit/plugins/ppapi/ppb_file_system_impl.cc

Index: webkit/plugins/ppapi/ppb_file_system_impl.cc
diff --git a/webkit/plugins/ppapi/ppb_file_system_impl.cc b/webkit/plugins/ppapi/ppb_file_system_impl.cc
index 9ba9b3f2bb525a387a445149ac4d555aa3bc0698..2a4bb05f7876e52ecc6d0e5bfc4d023d886c6216 100644
--- a/webkit/plugins/ppapi/ppb_file_system_impl.cc
+++ b/webkit/plugins/ppapi/ppb_file_system_impl.cc
@@ -46,9 +46,7 @@ PP_Resource PPB_FileSystem_Impl::Create(PluginInstance* instance,
       type != PP_FILESYSTEMTYPE_LOCALPERSISTENT &&
       type != PP_FILESYSTEMTYPE_LOCALTEMPORARY)
     return 0;
-
-  PPB_FileSystem_Impl* file_system = new PPB_FileSystem_Impl(instance, type);
-  return file_system->GetReference();
+  return (new PPB_FileSystem_Impl(instance, type))->GetReference();
 }
 
 PPB_FileSystem_API* PPB_FileSystem_Impl::AsPPB_FileSystem_API() {
@@ -74,8 +72,7 @@ int32_t PPB_FileSystem_Impl::Open(int64_t expected_size,
           instance()->container()->element().document().url(),
           file_system_type, expected_size,
           new FileCallbacks(instance()->module()->AsWeakPtr(),
-                            GetReferenceNoAddRef(),
-                            callback, NULL,
+                            pp_resource(), callback, NULL,
                             scoped_refptr<PPB_FileSystem_Impl>(this), NULL)))
     return PP_ERROR_FAILED;
   return PP_OK_COMPLETIONPENDING;