Add ui/display, message_center, webview to GN build.

ui/shell_dialogs/shell_dialogs.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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
+      # GN version: //ui/shell_dialogs
       'target_name': 'shell_dialogs',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:base_i18n',
         '../../skia/skia.gyp:skia',
         '../base/ui_base.gyp:ui_base',
         '../strings/ui_strings.gyp:ui_strings',
       ],
       'defines': [
         'SHELL_DIALOGS_IMPLEMENTATION',
       ],
       'sources': [
+        # Note: file list duplicated in GN build.
         'android/shell_dialogs_jni_registrar.cc',
         'android/shell_dialogs_jni_registrar.h',
         'base_shell_dialog.cc',
         'base_shell_dialog.h',
         'base_shell_dialog_win.cc',
         'base_shell_dialog_win.h',
         'linux_shell_dialog.cc',
         'linux_shell_dialog.h',
         'select_file_dialog.cc',
         'select_file_dialog.h',
         'select_file_dialog_android.cc',
         'select_file_dialog_android.h',
         'select_file_dialog_factory.cc',
         'select_file_dialog_factory.h',
         'select_file_dialog_mac.h',
         'select_file_dialog_mac.mm',
         'select_file_dialog_win.cc',
         'select_file_dialog_win.h',
         'select_file_policy.cc',
         'select_file_policy.h',
         'selected_file_info.cc',
         'selected_file_info.h',
       ],
       'conditions': [
         ['use_aura==1',
           {
             'dependencies': [
               '../aura/aura.gyp:aura',
             ],
-            'sources/': [
-              ['exclude', 'select_file_dialog_mac.mm'],
+            'sources!': [
+              'select_file_dialog_mac.mm',
             ],
           }
         ],
         ['OS=="android"',
           {
             'dependencies': [
               '../base/ui_base.gyp:ui_base_jni_headers',
             ],
             'include_dirs': [
               '<(SHARED_INTERMEDIATE_DIR)/ui',
@@ skipping 15 matching lines @@
         ['OS=="win"',
           {
             'dependencies': [
               '../../win8/win8.gyp:metro_viewer',
             ],
           }
         ],
       ],
     },  # target_name: shell_dialogs
     {
+      # GN version: //ui/shell_dialogs:shell_dialogs_unittests
       'target_name': 'shell_dialogs_unittests',
       'type': 'executable',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:test_support_base',
         '../../base/base.gyp:run_all_unittests',
         '../../testing/gtest.gyp:gtest',
         'shell_dialogs',
       ],
       'sources': [
+        # Note: file list duplicated in GN build.
         'select_file_dialog_win_unittest.cc',
       ],
     },
   ],
 }