Work on GN build, mostly in //ui

ui/resources/ui_resources.gyp

 # 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.
 
 {
   'targets': [
     {
+      # GN version: //ui/resources
       'target_name': 'ui_resources',
       'type': 'none',
       'variables': {
         'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources',
       },
       'actions': [
         {
           'action_name': 'ui_resources',
           'variables': {
             'grit_grd_file': 'ui_resources.grd',
@@ skipping 13 matching lines @@
             'grit_grd_file': 'ui_unscaled_resources.grd',
           },
           'includes': [ '../../build/grit_action.gypi' ],
         },
       ],
       'includes': [ '../../build/grit_target.gypi' ],
     },
     {
       # This creates a pak file that contains the resources in src/ui.
       # This pak file can be used by tests.
+      #
+      # GN version: //ui/resources:ui_test_pak
       'target_name': 'ui_test_pak',
       'type': 'none',
       'dependencies': [
         '../strings/ui_strings.gyp:ui_strings',
         'ui_resources',
       ],
       'actions': [
         {
           'action_name': 'repack_ui_test_pack',
           'variables': {
             'pak_inputs': [
               '<(SHARED_INTERMEDIATE_DIR)/ui/app_locale_settings/app_locale_settings_en-US.pak',
               '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources/ui_resources_100_percent.pak',
               '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources/webui_resources.pak',
               '<(SHARED_INTERMEDIATE_DIR)/ui/ui_strings/ui_strings_en-US.pak',
             ],
             'pak_output': '<(PRODUCT_DIR)/ui_test.pak',
           },
           'includes': [ '../../build/repack_action.gypi' ],
         },
       ],
       'conditions': [
         ['OS != "mac"', {
           'copies': [
             {
+              # GN version //ui/resources:copy_ui_resources_100_percent
               'destination': '<(PRODUCT_DIR)/ui',
               'files': [
                 '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources/ui_resources_100_percent.pak',
               ],
             },
           ],
         }],
         ['OS == "ios"', {
           'actions': [
             {
+              # GN version: //ui/resources:copy_ui_test_pak
               'action_name': 'copy_ui_test_pak',
               'message': 'Copying ui_test.pak into locale.pak',
               'inputs': [
                 '<(PRODUCT_DIR)/ui_test.pak',
               ],
               'outputs': [
                 '<(PRODUCT_DIR)/ui/en.lproj/locale.pak',
               ],
               'action': [
                 'python',
@@ skipping 21 matching lines @@
                 '<@(_inputs)',
                 '<@(_outputs)'
               ],
             },
           ],
         }],
       ],
     },
   ],
 }