[Chromoting] Use device::PowerSaveBlocker to block screen saver

remoting/host/it2me/it2me_host.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/host/it2me/it2me_host.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 248 matching lines @@
   std::unique_ptr<protocol::CandidateSessionConfig> protocol_config =
       protocol::CandidateSessionConfig::CreateDefault();
   // Disable audio by default.
   // TODO(sergeyu): Add UI to enable it.
   protocol_config->DisableAudioChannel();
   session_manager->set_protocol_config(std::move(protocol_config));
 
   // Create the host.
   host_.reset(new ChromotingHost(desktop_environment_factory_.get(),
                                  std::move(session_manager), transport_context,
-                                 host_context_->audio_task_runner(),
-                                 host_context_->video_encode_task_runner()));
+                                 *host_context_));
   host_->AddStatusObserver(this);
   host_status_logger_.reset(
       new HostStatusLogger(host_->AsWeakPtr(), ServerLogEntry::IT2ME,
                            signal_strategy_.get(), directory_bot_jid_));
 
   // Create event logger.
   host_event_logger_ =
       HostEventLogger::Create(host_->AsWeakPtr(), kApplicationName);
 
   // Connect signaling and start the host.
@@ skipping 241 matching lines @@
   std::unique_ptr<It2MeConfirmationDialogFactory> confirmation_dialog_factory(
       new It2MeConfirmationDialogFactory());
   std::unique_ptr<PolicyWatcher> policy_watcher =
       PolicyWatcher::Create(policy_service_, context->file_task_runner());
   return new It2MeHost(std::move(context), std::move(policy_watcher),
                        std::move(confirmation_dialog_factory), observer,
                        xmpp_server_config, directory_bot_jid);
 }
 
 }  // namespace remoting