Pepper: Move FileRef to the "new" resource proxy.

ppapi/proxy/file_io_resource.h

Index: ppapi/proxy/file_io_resource.h
diff --git a/ppapi/proxy/file_io_resource.h b/ppapi/proxy/file_io_resource.h
index 1a888d199d610b7ad2d1390a5fb6df75e681b15c..26c4abb948855e1de75250f44b28a13ee304c76d 100644
--- a/ppapi/proxy/file_io_resource.h
+++ b/ppapi/proxy/file_io_resource.h
@@ -7,11 +7,13 @@
 
 #include <string>
 
+#include "base/memory/scoped_ptr.h"
 #include "ppapi/c/private/pp_file_handle.h"
 #include "ppapi/proxy/connection.h"
 #include "ppapi/proxy/plugin_resource.h"
 #include "ppapi/proxy/ppapi_proxy_export.h"
 #include "ppapi/shared_impl/file_io_state_manager.h"
+#include "ppapi/shared_impl/resource.h"
 #include "ppapi/thunk/ppb_file_io_api.h"
 
 namespace ppapi {
@@ -137,6 +139,8 @@ class PPAPI_PROXY_EXPORT FileIOResource
   PP_FileSystemType file_system_type_;
   FileIOStateManager state_manager_;
 
+  scoped_refptr<Resource> file_ref_;
+
   DISALLOW_COPY_AND_ASSIGN(FileIOResource);
 };