Add more components to the GN build.

components/invalidation.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.
 
 {
   'targets': [
     {
+      # GN version: //components/invalidation
       'target_name': 'invalidation',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../google_apis/google_apis.gyp:google_apis',
         '../jingle/jingle.gyp:notifier',
         '../sync/sync.gyp:sync',
         '../third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation',
         'gcm_driver',
         'keyed_service_core',
         'pref_registry',
         'signin_core_browser',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
+        # Note: sources list duplicated in GN build.
         'invalidation/invalidation_logger.cc',
         'invalidation/invalidation_logger.h',
         'invalidation/invalidation_logger_observer.h',
         'invalidation/invalidation_prefs.cc',
         'invalidation/invalidation_prefs.h',
         'invalidation/invalidation_service.h',
         'invalidation/invalidation_service_util.cc',
         'invalidation/invalidation_service_util.h',
         'invalidation/invalidation_switches.cc',
         'invalidation/invalidation_switches.h',
         'invalidation/invalidator_registrar.cc',
         'invalidation/invalidator_registrar.h',
         'invalidation/invalidator_storage.cc',
         'invalidation/invalidator_storage.h',
         'invalidation/profile_invalidation_provider.cc',
         'invalidation/profile_invalidation_provider.h',
       ],
       'conditions': [
           ['OS != "android"', {
             'sources': [
+              # Note: sources list duplicated in GN build.
               'invalidation/gcm_invalidation_bridge.cc',
               'invalidation/gcm_invalidation_bridge.h',
               'invalidation/gcm_network_channel.cc',
               'invalidation/gcm_network_channel.h',
               'invalidation/gcm_network_channel_delegate.h',
               'invalidation/invalidation_notifier.cc',
               'invalidation/invalidation_notifier.h',
               'invalidation/non_blocking_invalidator.cc',
               'invalidation/non_blocking_invalidator.h',
               'invalidation/notifier_reason_util.cc',
@@ skipping 10 matching lines @@
               'invalidation/ticl_invalidation_service.cc',
               'invalidation/ticl_invalidation_service.h',
               'invalidation/ticl_settings_provider.cc',
               'invalidation/ticl_settings_provider.h',
             ],
           }],
       ],
     },
 
     {
+      # GN version: //components/invalidation:test_support
       'target_name': 'invalidation_test_support',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../google_apis/google_apis.gyp:google_apis',
         '../jingle/jingle.gyp:notifier',
         '../jingle/jingle.gyp:notifier_test_util',
         '../net/net.gyp:net',
         '../sync/sync.gyp:sync',
         '../sync/sync.gyp:test_support_sync_notifier',
         '../testing/gmock.gyp:gmock',
         '../third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation',
         'gcm_driver_test_support',
         'keyed_service_core',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
+        # Note: sources list duplicated in GN build.
         'invalidation/fake_invalidation_handler.cc',
         'invalidation/fake_invalidation_handler.h',
         'invalidation/fake_invalidation_state_tracker.cc',
         'invalidation/fake_invalidation_state_tracker.h',
         'invalidation/fake_invalidator.cc',
         'invalidation/fake_invalidator.h',
         'invalidation/invalidation_service_test_template.cc',
         'invalidation/invalidation_service_test_template.h',
         'invalidation/invalidator_test_template.cc',
         'invalidation/invalidator_test_template.h',
       ],
       'conditions': [
           ['OS != "android"', {
             'sources': [
+              # Note: sources list duplicated in GN build.
               'invalidation/p2p_invalidation_service.cc',
               'invalidation/p2p_invalidation_service.h',
             ],
           }],
       ],
     },
   ],
 }