Move ownership of Transport out of Session.

remoting/protocol/fake_authenticator.cc

Index: remoting/protocol/fake_authenticator.cc
diff --git a/remoting/protocol/fake_authenticator.cc b/remoting/protocol/fake_authenticator.cc
index 2d25898a75a57b05ee27f16555798459190b2446..416d391ad409f97ac75b165693abb81a8457890c 100644
--- a/remoting/protocol/fake_authenticator.cc
+++ b/remoting/protocol/fake_authenticator.cc
@@ -37,9 +37,9 @@ void FakeChannelAuthenticator::SecureAndAuthenticate(
     const DoneCallback& done_callback) {
   socket_ = std::move(socket);
 
-  if (async_) {
-    done_callback_ = done_callback;
+  done_callback_ = done_callback;
 
+  if (async_) {
     if (result_ != net::OK) {
       // Don't write anything if we are going to reject auth to make test
       // ordering deterministic.