Set empty shared secret for Me2Me hosts.

remoting/host/chromoting_host.cc

Index: remoting/host/chromoting_host.cc
diff --git a/remoting/host/chromoting_host.cc b/remoting/host/chromoting_host.cc
index 1e958cc6aee81e45599d3cbe0f609f4f764bc3dc..dda4c0136c8c4f392a960ba6db32e2b95703ed88 100644
--- a/remoting/host/chromoting_host.cc
+++ b/remoting/host/chromoting_host.cc
@@ -77,6 +77,10 @@ void ChromotingHost::Start() {
     return;
   state_ = kStarted;
 
+  // Create the session manager.
+  session_manager_.reset(
+      new protocol::JingleSessionManager(context_->network_message_loop()));
+
   // Assign key and certificate to server.
   if (!key_pair_.Load(config_)) {
     LOG(ERROR) << "Failed to load key pair for the host.";
@@ -270,15 +274,10 @@ void ChromotingHost::OnStateChange(
   if (state == SignalStrategy::StatusObserver::CONNECTED) {
     LOG(INFO) << "Host connected as " << local_jid_;
 
-    // Create and start session manager.
-    protocol::JingleSessionManager* server =
-        new protocol::JingleSessionManager(context_->network_message_loop());
-
-    server->Init(local_jid_, signal_strategy_.get(),
+    // Start the session manager.
+    session_manager_->Init(local_jid_, signal_strategy_.get(),
                  this, allow_nat_traversal_);
 
-    session_manager_.reset(server);
-
     for (StatusObserverList::iterator it = status_observers_.begin();
          it != status_observers_.end(); ++it) {
       (*it)->OnSignallingConnected(signal_strategy_.get(), local_jid_);