Clean-up inline members of nested classes (remoting/)

remoting/jingle_glue/signal_strategy.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_JINGLE_GLUE_SIGNAL_STRATEGY_H_
 #define REMOTING_JINGLE_GLUE_SIGNAL_STRATEGY_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 28 matching lines @@
   // Callback interface for signaling event. Event handlers are not
   // allowed to destroy SignalStrategy, but may add or remove other
   // listeners.
   class Listener {
    public:
     virtual ~Listener() {}
 
     // Called after state of the connection has changed. If the state
     // is DISCONNECTED, then GetError() can be used to get the reason
     // for the disconnection.
-    virtual void OnSignalStrategyStateChange(State state) {}
+    virtual void OnSignalStrategyStateChange(State state) = 0;
 
     // Must return true if the stanza was handled, false
     // otherwise. The signal strategy must not be deleted from a
     // handler of this message.
     virtual bool OnSignalStrategyIncomingStanza(
-        const buzz::XmlElement* stanza) { return false; }
+        const buzz::XmlElement* stanza) = 0;
   };
 
   SignalStrategy() {}
   virtual ~SignalStrategy() {}
 
   // Starts connection attempt. If connection is currently active
   // disconnects it and opens a new connection (implicit disconnect
   // triggers CLOSED notification). Connection is finished
   // asynchronously.
   virtual void Connect() = 0;
@@ skipping 26 matching lines @@
   // request.
   virtual std::string GetNextId() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SignalStrategy);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_JINGLE_GLUE_SIGNAL_STRATEGY_H_