Move AppWindow related classes to extensions

extensions/DEPS

 include_rules = [
   # Do not add Chrome dependencies. Much work went into removing them.
   "+components/crx_file",
   "+components/url_matcher",
   "-content",
   "+content/public/common",
   "+content/public/test",
   "+crypto",
   "+grit/content_resources.h",
   "+grit/extensions_renderer_resources.h",
@@ skipping 14 matching lines @@
     # TODO(jamescook): Remove these. http://crbug.com/162530
     "+chrome/browser/apps/app_browsertest_util.h",
     "+chrome/browser/extensions/api/management/management_api.h",
     "+chrome/browser/extensions/api/permissions/permissions_api.h",
     "+chrome/browser/extensions/extension_api_unittest.h",
     "+chrome/browser/extensions/extension_apitest.h",
     "+chrome/browser/extensions/extension_function_test_utils.h",
     "+chrome/browser/extensions/extension_service.h",
     "+chrome/browser/extensions/extension_service_test_base.h",
     "+chrome/browser/extensions/test_extension_dir.h",
+    "+chrome/browser/extensions/test_extension_prefs.h",
     "+chrome/browser/extensions/test_extension_system.h",
     "+chrome/browser/ui/browser.h",
     "+chrome/common/chrome_paths.h",
     "+chrome/common/extensions/features/feature_channel.h",
     "+chrome/common/extensions/manifest_tests/extension_manifest_test.h",
     "+chrome/test/base/browser_with_test_window_test.h",
     "+chrome/test/base/testing_profile.h",
     "+chrome/test/base/ui_test_utils.h",
   ],
   "(simple|complex)_feature_unittest\.cc|base_feature_provider_unittest\.cc": [
     "+chrome/common/extensions/features/chrome_channel_feature_filter.h",
   ],
   "permissions_data_unittest\.cc": [
     "+chrome/common/chrome_version_info.h",
     "+chrome/common/extensions/extension_test_util.h",
     "+chrome/common/extensions/features/feature_channel.h",
   ],
 }