Add P2PDatagramSocket and P2PStreamSocket interfaces.

remoting/protocol/channel_dispatcher_base.h

Index: remoting/protocol/channel_dispatcher_base.h
diff --git a/remoting/protocol/channel_dispatcher_base.h b/remoting/protocol/channel_dispatcher_base.h
index 64011b83102a7ca8bb79b8757883f52a73a65bb9..580e258d186d015fb5f38a731a5fd90a558756a0 100644
--- a/remoting/protocol/channel_dispatcher_base.h
+++ b/remoting/protocol/channel_dispatcher_base.h
@@ -66,13 +66,13 @@ class ChannelDispatcherBase {
   MessageReader* reader() { return &reader_; }
 
  private:
-  void OnChannelReady(scoped_ptr<net::StreamSocket> socket);
+  void OnChannelReady(scoped_ptr<P2PStreamSocket> socket);
   void OnReadWriteFailed(int error);
 
   std::string channel_name_;
   StreamChannelFactory* channel_factory_;
   EventHandler* event_handler_;
-  scoped_ptr<net::StreamSocket> channel_;
+  scoped_ptr<P2PStreamSocket> channel_;
 
   BufferedSocketWriter writer_;
   MessageReader reader_;