Ensure the Chromoting Host process eventually terminates when shut down.

remoting/remoting_host_srcs.gypi

 # Copyright 2014 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.
 
 {
   'variables': {
     'remoting_host_sources': [
       'host/audio_capturer.cc',
       'host/audio_capturer.h',
       'host/audio_capturer_linux.cc',
@@ skipping 187 matching lines @@
       'host/sas_injector_win.cc',
       'host/screen_controls.h',
       'host/screen_resolution.cc',
       'host/screen_resolution.h',
       'host/server_log_entry_host.cc',
       'host/server_log_entry_host.h',
       'host/session_manager_factory.cc',
       'host/session_manager_factory.h',
       'host/shaped_desktop_capturer.cc',
       'host/shaped_desktop_capturer.h',
+      'host/shutdown_watchdog.cc',
+      'host/shutdown_watchdog.h',
       'host/signaling_connector.cc',
       'host/signaling_connector.h',
       'host/single_window_desktop_environment.cc',
       'host/single_window_desktop_environment.h',
       'host/single_window_input_injector.h',
       'host/single_window_input_injector_linux.cc',
       'host/single_window_input_injector_mac.cc',
       'host/single_window_input_injector_win.cc',
       'host/token_validator_base.cc',
       'host/token_validator_base.h',
@@ skipping 42 matching lines @@
       'host/cast_video_capturer_adapter.h',
     ],
     'remoting_it2me_host_static_sources' : [
       'host/it2me/it2me_host.cc',
       'host/it2me/it2me_host.h',
       'host/it2me/it2me_native_messaging_host.cc',
       'host/it2me/it2me_native_messaging_host.h',
     ],
   }
 }