Refactor SignalStrategy so that it can be reused for multiple connections.

remoting/jingle_glue/jingle_signaling_connector.h

Index: remoting/jingle_glue/jingle_signaling_connector.h
diff --git a/remoting/jingle_glue/jingle_signaling_connector.h b/remoting/jingle_glue/jingle_signaling_connector.h
index 2aa41bc274dd76c78f880a4e8d5bb20bc1fb09e9..f26fb32781bf147cd68018f7ef4eabb5915010c9 100644
--- a/remoting/jingle_glue/jingle_signaling_connector.h
+++ b/remoting/jingle_glue/jingle_signaling_connector.h
@@ -41,7 +41,10 @@ class JingleSignalingConnector : public SignalStrategy::Listener,
   virtual ~JingleSignalingConnector();
 
   // SignalStrategy::Listener interface.
-  virtual bool OnIncomingStanza(const buzz::XmlElement* stanza) OVERRIDE;
+  virtual void OnSignalStrategyStateChange(
+      SignalStrategy::State state) OVERRIDE;
+  virtual bool OnSignalStrategyIncomingStanza(
+      const buzz::XmlElement* stanza) OVERRIDE;
 
  private:
   typedef std::map<std::string, buzz::XmlElement*> IqRequestsMap;