remoting: Cleanup class/struct fwd declarations

remoting/host/host_status_observer.h

 // Copyright (c) 2012 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_HOST_HOST_STATUS_OBSERVER_H_
 #define REMOTING_HOST_HOST_STATUS_OBSERVER_H_
 
 #include <string>
 
-namespace net {
-class IPEndPoint;
-}  // namespace net
-
 namespace remoting {
-class SignalStrategy;
 
 namespace protocol {
 struct TransportRoute;
 };
 
 // Interface for host status observer. All methods are invoked on the
 // network thread. Observers must not tear-down ChromotingHost state
 // on receipt of these callbacks; they are purely informational.
 class HostStatusObserver {
  public:
@@ skipping 21 matching lines @@
   // Called when hosting is started for an account.
   virtual void OnStart(const std::string& host_owner_email) {}
 
   // Called when the host shuts down.
   virtual void OnShutdown() {}
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_HOST_STATUS_OBSERVER_H_