Add some remoting targets to GN build.

google_apis/google_apis.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,  # Use higher warning level.
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 21 matching lines @@
             'GOOGLE_DEFAULT_CLIENT_ID="<(google_default_client_id)"',
           ]
         }],
         ['google_default_client_secret!=""', {
           'defines': [
             'GOOGLE_DEFAULT_CLIENT_SECRET="<(google_default_client_secret)"',
           ]
         }],
         ['enable_extensions==1', {
           'sources': [
+            # Note: sources list duplicated in GN build.
             'drive/auth_service.cc',
             'drive/auth_service.h',
             'drive/auth_service_interface.h',
             'drive/auth_service_observer.h',
             'drive/base_requests.cc',
             'drive/base_requests.h',
             'drive/drive_api_parser.cc',
             'drive/drive_api_parser.h',
             'drive/drive_api_requests.cc',
             'drive/drive_api_requests.h',
@@ skipping 13 matching lines @@
             'drive/request_util.cc',
             'drive/request_util.h',
             'drive/task_util.cc',
             'drive/task_util.h',
             'drive/time_util.cc',
             'drive/time_util.h',
           ],
         }],
       ],
       'sources': [
+        # Note: sources list duplicated in GN build.
         'gaia/account_tracker.cc',
         'gaia/account_tracker.h',
         'gaia/gaia_auth_consumer.cc',
         'gaia/gaia_auth_consumer.h',
         'gaia/gaia_auth_fetcher.cc',
         'gaia/gaia_auth_fetcher.h',
         'gaia/gaia_auth_util.cc',
         'gaia/gaia_auth_util.h',
         'gaia/gaia_constants.cc',
         'gaia/gaia_constants.h',
@@ skipping 114 matching lines @@
             'drive/dummy_auth_service.cc',
             'drive/dummy_auth_service.h',
             'drive/test_util.cc',
             'drive/test_util.h',
           ],
         }],
       ],
     },
   ],
 }