Pass the desktop session ID to the remoting network process.

remoting/host/ipc_desktop_environment.cc

Index: remoting/host/ipc_desktop_environment.cc
diff --git a/remoting/host/ipc_desktop_environment.cc b/remoting/host/ipc_desktop_environment.cc
index 9cafaf932a1e3f28706f01d9a844942330a2b619..f4f9c006d72a29bd72570d3171deb49146892113 100644
--- a/remoting/host/ipc_desktop_environment.cc
+++ b/remoting/host/ipc_desktop_environment.cc
@@ -166,19 +166,21 @@ void IpcDesktopEnvironmentFactory::SetScreenResolution(
 
 void IpcDesktopEnvironmentFactory::OnDesktopSessionAgentAttached(
     int terminal_id,
+    int session_id,
     const IPC::ChannelHandle& desktop_pipe) {
   if (!caller_task_runner_->BelongsToCurrentThread()) {
     caller_task_runner_->PostTask(
         FROM_HERE,
         base::Bind(&IpcDesktopEnvironmentFactory::OnDesktopSessionAgentAttached,
-                   base::Unretained(this), terminal_id, desktop_pipe));
+                   base::Unretained(this), terminal_id, session_id,
+                   desktop_pipe));
     return;
   }
 
   ActiveConnectionsList::iterator i = active_connections_.find(terminal_id);
   if (i != active_connections_.end()) {
     i->second->DetachFromDesktop();
-    i->second->AttachToDesktop(desktop_pipe);
+    i->second->AttachToDesktop(desktop_pipe, session_id);
   } else {
     mojo::ScopedMessagePipeHandle closer(desktop_pipe.mojo_handle);
   }