Propagate connection state from networking layer to UI.

remoting/protocol/connection_to_host.cc

Index: remoting/protocol/connection_to_host.cc
diff --git a/remoting/protocol/connection_to_host.cc b/remoting/protocol/connection_to_host.cc
index 5794c50216f15daff92d3da49b1890f40c3e2612..16893dd19c5d23d2b2906c67e0c53268674bb0d0 100644
--- a/remoting/protocol/connection_to_host.cc
+++ b/remoting/protocol/connection_to_host.cc
@@ -209,6 +209,12 @@ void ConnectionToHost::OnSessionRouteChange(const std::string& channel_name,
                                             const TransportRoute& route) {
 }
 
+void ConnectionToHost::OnSessionInactive(const std::string& channel_name,
+                                         bool inactive) {
+  if (channel_name == kVideoChannelName)
+    event_callback_->OnConnectionInactive(inactive);
+}
+
 ConnectionToHost::State ConnectionToHost::state() const {
   return state_;
 }