Switch remoting/protocol to new callbacks

remoting/protocol/jingle_session.h

Index: remoting/protocol/jingle_session.h
diff --git a/remoting/protocol/jingle_session.h b/remoting/protocol/jingle_session.h
index cd467a1dff24beb9b300f8425fc7ef5eba0c9f7b..4bff0014a5c7b3c6800ab8cbdf0d20e0deca5389 100644
--- a/remoting/protocol/jingle_session.h
+++ b/remoting/protocol/jingle_session.h
@@ -27,7 +27,8 @@ class JingleSession : public protocol::Session,
                       public sigslot::has_slots<> {
  public:
   // Session interface.
-  virtual void SetStateChangeCallback(StateChangeCallback* callback) OVERRIDE;
+  virtual void SetStateChangeCallback(
+      const StateChangeCallback& callback) OVERRIDE;
   virtual Error error() OVERRIDE;
   virtual void CreateStreamChannel(
       const std::string& name,
@@ -149,7 +150,7 @@ class JingleSession : public protocol::Session,
   std::string shared_secret_;
 
   State state_;
-  scoped_ptr<StateChangeCallback> state_change_callback_;
+  StateChangeCallback state_change_callback_;
 
   Error error_;