[Chromoting] Use HostExperimentSessionPlugin in host

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 65727137b934e82d076909e164840c4a5f2e9171..047be72fc19f92b2b361f98b90b5eaa188885820 100644
--- a/remoting/host/chromoting_host.cc
+++ b/remoting/host/chromoting_host.cc
@@ -256,12 +256,11 @@ void ChromotingHost::OnIncomingSession(
         video_encode_task_runner_, audio_task_runner_));
   }
 
-  DesktopEnvironmentOptions options = desktop_environment_options_;
-  // TODO(zijiehe): Apply HostSessionOptions to options.
   // Create a ClientSession object.
   clients_.push_back(base::MakeUnique<ClientSession>(
-      this, std::move(connection), desktop_environment_factory_, options,
-      max_session_duration_, pairing_registry_, extensions_.get()));
+      this, std::move(connection), desktop_environment_factory_,
+      desktop_environment_options_, max_session_duration_, pairing_registry_,
+      extensions_.get()));
 }
 
 }  // namespace remoting