Add GN build for some chrome common, chrome net, and resources targets.

chrome/chrome_resources.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': {
     'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome',
     'about_credits_file': '<(SHARED_INTERMEDIATE_DIR)/about_credits.html',
     'additional_modules_list_file': '<(SHARED_INTERMEDIATE_DIR)/chrome/browser/internal/additional_modules_list.txt',
     'omnibox_mojom_file': '<(SHARED_INTERMEDIATE_DIR)/chrome/browser/ui/webui/omnibox/omnibox.mojom.js',
   },
@@ skipping 112 matching lines @@
             }, { # else use_chromevox_next == 0
               'dependencies': [
                 'browser/resources/chromeos/chromevox/chromevox.gyp:chromevox',
               ],
             }],
           ],
         }],
       ],
     },
     {
+      # GN version: //chrome/browser:chrome_internal_resources_gen
       'target_name': 'chrome_internal_resources_gen',
       'type': 'none',
       'conditions': [
         ['branding=="Chrome"', {
           'actions': [
             {
               'action_name': 'generate_transform_additional_modules_list',
               'variables': {
                 'additional_modules_input_path':
                   'browser/internal/resources/additional_modules_list.input',
@@ skipping 16 matching lines @@
             }
           ],
         }],
       ],
     },
     {
       # TODO(mark): It would be better if each static library that needed
       # to run grit would list its own .grd files, but unfortunately some
       # of the static libraries currently have circular dependencies among
       # generated headers.
+
+      # GN version: //chrome:resources
       'target_name': 'chrome_resources',
       'type': 'none',
       'dependencies': [
         'about_credits',
         'chrome_internal_resources_gen',
         'chrome_web_ui_mojo_bindings.gyp:web_ui_mojo_bindings',
       ],
       'actions': [
         {
+          # GN version: //chrome/browser:resources
           'action_name': 'generate_browser_resources',
           'variables': {
             'grit_grd_file': 'browser/browser_resources.grd',
             'grit_additional_defines': [
               '-E', 'about_credits_file=<(about_credits_file)',
               '-E', 'additional_modules_list_file=<(additional_modules_list_file)',
               '-E', 'omnibox_mojom_file=<(omnibox_mojom_file)',
             ],
           },
           'includes': [ '../build/grit_action.gypi' ],
         },
         {
+          # GN version: //chrome/common:resources
           'action_name': 'generate_common_resources',
           'variables': {
             'grit_grd_file': 'common/common_resources.grd',
           },
           'includes': [ '../build/grit_action.gypi' ],
         },
         {
+          # GN version: //chrome/renderer:resources
           'action_name': 'generate_renderer_resources',
           'variables': {
             'grit_grd_file': 'renderer/resources/renderer_resources.grd',
           },
           'includes': [ '../build/grit_action.gypi' ],
         },
       ],
       'conditions': [
         ['enable_extensions==1', {
           'actions': [
             {
+              # GN version: //chrome/common:extensions_api_resources
               'action_name': 'generate_extensions_api_resources',
               'variables': {
                 'grit_grd_file': 'common/extensions_api_resources.grd',
               },
               'includes': [ '../build/grit_action.gypi' ],
             }
           ],
         }],
       ],
       'includes': [ '../build/grit_target.gypi' ],
@@ skipping 277 matching lines @@
           'action_name': 'generate_chrome_unscaled_resources',
           'variables': {
             'grit_grd_file': 'app/theme/chrome_unscaled_resources.grd',
           },
           'includes': [ '../build/grit_action.gypi' ],
         },
       ],
       'includes': [ '../build/grit_target.gypi' ],
     },
     {
+      # GN version: //chrome/browser:about_credits
       'target_name': 'about_credits',
       'type': 'none',
       'actions': [
         {
           'variables': {
             'generator_path': '../tools/licenses.py',
           },
           'action_name': 'generate_about_credits',
           'inputs': [
             # TODO(phajdan.jr): make licenses.py print inputs too.
             '<(generator_path)',
           ],
           'outputs': [
             '<(about_credits_file)',
           ],
           'hard_dependency': 1,
           'action': ['python',
                      '<(generator_path)',
                      'credits',
                      '<(about_credits_file)',
           ],
           'message': 'Generating about:credits',
         },
       ],
     },
   ], # targets
 }