Cleanup: Remove unneeded forward declarations from remoting.

remoting/protocol/session.h

 // Copyright (c) 2011 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 REMOTING_PROTOCOL_SESSION_H_
 #define REMOTING_PROTOCOL_SESSION_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/threading/non_thread_safe.h"
 #include "remoting/protocol/buffered_socket_writer.h"
 #include "remoting/protocol/session_config.h"
 
-class Task;
-
 namespace net {
 class Socket;
 class StreamSocket;
 }  // namespace net
 
 namespace remoting {
 namespace protocol {
 
 // Generic interface for Chromotocol connection used by both client and host.
 // Provides access to the connection channels, but doesn't depend on the
@@ skipping 103 matching lines @@
   virtual void Close() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Session);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_SESSION_H_