Add remaining remoting targets for the GN build.

remoting/remoting_host.gypi

 # Copyright (c) 2012 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.
 
 {
   'includes': [
     'remoting_enable.gypi',
   ],
 
   'conditions': [
@@ skipping 283 matching lines @@
               '--define', 'ME2ME_HOST_PATH=<(me2me_host_path)',
               '--define', 'IT2ME_HOST_PATH=<(it2me_host_path)',
               '--variables', '<(branding_path)',
               '--template', '<(RULE_INPUT_PATH)',
               '--locale_output', '<@(_outputs)',
               'en',
             ],
           }],
         },  # end of target 'remoting_native_messaging_manifests'
         {
+          # GN target: //remoting/host:remoting_start_host
           'target_name': 'remoting_start_host',
           'type': 'executable',
           'dependencies': [
             'remoting_host_setup_base',
           ],
           'sources': [
             'host/setup/host_starter.cc',
             'host/setup/host_starter.h',
             'host/setup/start_host.cc',
           ],
@@ skipping 402 matching lines @@
               # Dummy target for chromeos==1
               'target_name': 'remoting_it2me_native_messaging_host',
               'type': 'executable',
             },
           ],  # targets
         }],  # end of chromeos==0
       ],  # end of conditions
     }],  # end of OS!="win" and enable_remoting_host==1
   ],  # end of 'conditions'
 }