Access Session::config() and Session::jid() on the correct thread only.

remoting/protocol/jingle_session.cc

Index: remoting/protocol/jingle_session.cc
diff --git a/remoting/protocol/jingle_session.cc b/remoting/protocol/jingle_session.cc
index b80239c62ccb0796d9e69495b400079b69093d0c..b30101c1244ee932064c33d4eb53c6925630da6f 100644
--- a/remoting/protocol/jingle_session.cc
+++ b/remoting/protocol/jingle_session.cc
@@ -165,10 +165,7 @@ net::Socket* JingleSession::event_channel() {
 }
 
 const std::string& JingleSession::jid() {
-  // TODO(sergeyu): Fix ChromotingHost so that it doesn't call this
-  // method on invalid thread and uncomment this DCHECK.
-  // See crbug.com/88600 .
-  // DCHECK(CalledOnValidThread());
+  DCHECK(CalledOnValidThread());
   return jid_;
 }
 
@@ -192,10 +189,7 @@ const std::string& JingleSession::local_certificate() const {
 }
 
 const SessionConfig& JingleSession::config() {
-  // TODO(sergeyu): Fix ChromotingHost so that it doesn't call this
-  // method on invalid thread and uncomment this DCHECK.
-  // See crbug.com/88600 .
-  // DCHECK(CalledOnValidThread());
+  DCHECK(CalledOnValidThread());
   DCHECK(config_set_);
   return config_;
 }