Set incoming_only flag on the host side when NAT traversal is disabled.

remoting/host/remoting_me2me_host.cc

Index: remoting/host/remoting_me2me_host.cc
diff --git a/remoting/host/remoting_me2me_host.cc b/remoting/host/remoting_me2me_host.cc
index 5676f1a75f8b136ed913c6ac6e3a281f4ea01113..ad34869e09c67e19f842a171abcd9fe7b4c55b1b 100644
--- a/remoting/host/remoting_me2me_host.cc
+++ b/remoting/host/remoting_me2me_host.cc
@@ -208,8 +208,7 @@ class HostProcess {
     if (!desktop_environment_.get())
       desktop_environment_.reset(DesktopEnvironment::Create(&context_));
 
-    protocol::NetworkSettings network_settings;
-    network_settings.allow_nat_traversal = allow_nat_traversal_;
+    protocol::NetworkSettings network_settings(allow_nat_traversal_);
     if (!allow_nat_traversal_) {
       network_settings.min_port = kMinPortNumber;
       network_settings.max_port = kMaxPortNumber;