Fix classes that have too many virtuals for inline constructors.

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:
-  HostStatusObserver() { }
   virtual ~HostStatusObserver() { }
 
   // Called when an unauthorized user attempts to connect to the host.
   virtual void OnAccessDenied(const std::string& jid) {}
 
   // A new client is authenticated.
   virtual void OnClientAuthenticated(const std::string& jid) {}
 
   // All channels for an autheticated client are connected.
   virtual void OnClientConnected(const std::string& jid) {}
 
   // An authenticated client is disconnected.
   virtual void OnClientDisconnected(const std::string& jid) {}
 
   // Called on notification of a route change event, when a channel is
   // connected.
   virtual void OnClientRouteChange(const std::string& jid,
                                    const std::string& channel_name,
                                    const protocol::TransportRoute& route) {}
 
   // 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() {}
+
+ protected:
+  HostStatusObserver() {}
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_HOST_STATUS_OBSERVER_H_