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

ppapi/shared_impl/file_ref_create_info.h

 // Copyright 2013 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.
 
 #ifndef PPAPI_SHARED_IMPL_FILE_REF_CREATE_INFO_H
 #define PPAPI_SHARED_IMPL_FILE_REF_CREATE_INFO_H
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "ppapi/c/pp_file_info.h"
 #include "ppapi/c/pp_resource.h"
+#include "ppapi/shared_impl/ppapi_shared_export.h"
 
 namespace ppapi {
 
 // FileRefs are created in a number of places and they include a number of
 // return values. This struct encapsulates everything in one place.
 struct FileRef_CreateInfo {
+  FileRef_CreateInfo() :
+    file_system_type(PP_FILESYSTEMTYPE_INVALID),
+    pending_host_resource_id(0),
+    file_system_plugin_resource(0) { }
+
   PP_FileSystemType file_system_type;
   std::string internal_path;
   std::string display_name;
 
   // Used when a FileRef is created in the Renderer.
   int pending_host_resource_id;
 
   // Since FileRef needs to hold a FileSystem reference, we need to pass the
   // resource in this CreateInfo.
   PP_Resource file_system_plugin_resource;
 };
 
+// Used in the renderer when sending a FileRef_CreateInfo to a plugin for a
+// FileRef on an external filesystem.
+PPAPI_SHARED_EXPORT FileRef_CreateInfo
+MakeExternalFileRefCreateInfo(const base::FilePath& external_path,
+                              int pending_host_resource_id);
+
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_FILE_REF_CREATE_INFO_H