[NaCl SDK] Add some more logging to nacl_io.

native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.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 LIBRARIES_NACL_IO_HTML5FS_HTML5_FS_H_
 #define LIBRARIES_NACL_IO_HTML5FS_HTML5_FS_H_
 
 #include <pthread.h>
 
 #include "nacl_io/filesystem.h"
@@ skipping 28 matching lines @@
   virtual void Destroy();
 
   virtual Error RemoveInternal(const Path& path, int remove_type);
   Error BlockUntilFilesystemOpen();
 
  private:
   static void FilesystemOpenCallbackThunk(void* user_data, int32_t result);
   void FilesystemOpenCallback(int32_t result);
   Path GetFullPath(const Path& path);
 
+  CoreInterface* core_iface_;
+  FileSystemInterface* filesystem_iface_;
+  FileRefInterface* file_ref_iface_;
+  FileIoInterface* file_io_iface_;
+
   PP_Resource filesystem_resource_;
   bool filesystem_open_has_result_;  // protected by lock_.
   Error filesystem_open_error_;      // protected by lock_.
 
   pthread_cond_t filesystem_open_cond_;
   sdk_util::SimpleLock filesysem_open_lock_;
   std::string prefix_;
 
   friend class TypedFsFactory<Html5Fs>;
 };
 
 }  // namespace nacl_io
 
 #endif  // LIBRARIES_NACL_IO_HTML5FS_HTML5_FS_H_