[Chromoting] Add SessionPlugin in JingleSession

remoting/protocol/fake_session.cc

Index: remoting/protocol/fake_session.cc
diff --git a/remoting/protocol/fake_session.cc b/remoting/protocol/fake_session.cc
index f4d5cd158f17a0e24c7ef26cff050ff50a9c367d..2f31aa64cea8b5a0cc0c4c257dbfa82dc3dfbcac 100644
--- a/remoting/protocol/fake_session.cc
+++ b/remoting/protocol/fake_session.cc
@@ -7,6 +7,7 @@
 #include "base/location.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "remoting/protocol/fake_authenticator.h"
+#include "remoting/protocol/session_plugin.h"
 #include "third_party/webrtc/libjingle/xmllite/xmlelement.h"
 
 namespace remoting {
@@ -102,5 +103,8 @@ void FakeSession::ProcessTransportInfo(
   transport_->ProcessTransportInfo(transport_info.get());
 }
 
+// TODO(zijiehe): Supports SessionPlugin in FakeSession.
+void FakeSession::Attach(std::unique_ptr<SessionPlugin> plugin) {}
+
 }  // namespace protocol
 }  // namespace remoting