Add P2PDatagramSocket and P2PStreamSocket interfaces.

remoting/protocol/channel_authenticator.h

Index: remoting/protocol/channel_authenticator.h
diff --git a/remoting/protocol/channel_authenticator.h b/remoting/protocol/channel_authenticator.h
index 8bef908df5cc810777fe2e2ec2239efd505681e0..e29e7d8cc5850244b4ff603f37d7307715e8e954 100644
--- a/remoting/protocol/channel_authenticator.h
+++ b/remoting/protocol/channel_authenticator.h
@@ -9,20 +9,18 @@
 
 #include "base/callback_forward.h"
 
-namespace net {
-class StreamSocket;
-}  // namespace net
-
 namespace remoting {
 namespace protocol {
 
+class P2PStreamSocket;
+
 // Interface for channel authentications that perform channel-level
 // authentication. Depending on implementation channel authenticators
 // may also establish SSL connection. Each instance of this interface
 // should be used only once for one channel.
 class ChannelAuthenticator {
  public:
-  typedef base::Callback<void(int error, scoped_ptr<net::StreamSocket>)>
+  typedef base::Callback<void(int error, scoped_ptr<P2PStreamSocket>)>
       DoneCallback;
 
   virtual ~ChannelAuthenticator() {}
@@ -31,7 +29,7 @@ class ChannelAuthenticator {
   // authentication is finished. Callback may be invoked before this method
   // returns, and may delete the calling authenticator.
   virtual void SecureAndAuthenticate(
-      scoped_ptr<net::StreamSocket> socket,
+      scoped_ptr<P2PStreamSocket> socket,
       const DoneCallback& done_callback) = 0;
 };