Cleanup remaining class/struct fwd declarations

native_client_sdk/src/libraries/nacl_io/devfs/jspipe_node.h

 // Copyright 2014 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_DEVFS_JSPIPE_NODE_H_
 #define LIBRARIES_NACL_IO_DEVFS_JSPIPE_NODE_H_
 
 #include <ppapi/c/pp_var.h>
 #include <string>
 
 #include "nacl_io/devfs/jspipe_event_emitter.h"
 #include "nacl_io/stream/stream_node.h"
 
 namespace nacl_io {
 
-class MessagingInterface;
-class VarInterface;
-class VarArrayInterface;
-class VarArrayBufferInterface;
-class VarDictionaryInterface;
-
 /**
  * JSPipeNode represents a two-way channel for communicating with JavaScript
  * via calls to PostMessage.  In order to use these some amount of logic on
  * the JavaScript side is also required.  The protocol to the communication
  * looks the same in both directions and consists of two message types:
  * 'write' and 'ack'.
  * The messages are formated as JavaScript dictionary objects and take the
  * following form:
  * {
  *   pipe: <pipe_name>,
@@ skipping 31 matching lines @@
 
  protected:
   Error SendAck();
 
   ScopedJSPipeEventEmitter pipe_;
 };
 
 }  // namespace nacl_io
 
 #endif  // LIBRARIES_NACL_IO_DEVFS_JSPIPE_NODE_H_