Inline extensions .gypi files into GN build.

extensions/BUILD.gn

 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//extensions/extensions.gni")
 import("//testing/test.gni")
 import("//tools/grit/grit_rule.gni")
 import("//tools/grit/repack.gni")
 
 assert(enable_extensions)
 
 group("extensions_resources") {
   public_deps = [
     ":extensions_browser_resources",
     ":extensions_renderer_resources",
@@ skipping 38 matching lines @@
   deps = [
     "//chrome/browser/media/router:mojo_bindings__generator",
     "//device/serial:serial_mojo__generator",
     "//extensions/common:mojo__generator",
     "//extensions/common/api:mojom__generator",
   ]
 }
 
 static_library("test_support") {
   testonly = true
-  sources = rebase_path(extensions_gypi_values.extensions_test_support_sources,
-                        ".",
-                        "//extensions")
+  sources = [
+    "browser/api/cast_channel/cast_test_util.cc",
+    "browser/api/cast_channel/cast_test_util.h",
+    "browser/api/dns/mock_host_resolver_creator.cc",
+    "browser/api/dns/mock_host_resolver_creator.h",
+    "browser/api/storage/settings_test_util.cc",
+    "browser/api/storage/settings_test_util.h",
+    "browser/api_test_utils.cc",
+    "browser/api_test_utils.h",
+    "browser/api_unittest.cc",
+    "browser/api_unittest.h",
+    "browser/app_window/test_app_window_contents.cc",
+    "browser/app_window/test_app_window_contents.h",
+    "browser/extension_error_test_util.cc",
+    "browser/extension_error_test_util.h",
+    "browser/extensions_test.cc",
+    "browser/extensions_test.h",
+    "browser/guest_view/mime_handler_view/test_mime_handler_view_guest.cc",
+    "browser/guest_view/mime_handler_view/test_mime_handler_view_guest.h",
+    "browser/mock_extension_system.cc",
+    "browser/mock_extension_system.h",
+    "browser/scoped_ignore_content_verifier_for_test.cc",
+    "browser/scoped_ignore_content_verifier_for_test.h",
+    "browser/test_extension_registry_observer.cc",
+    "browser/test_extension_registry_observer.h",
+    "browser/test_extensions_browser_client.cc",
+    "browser/test_extensions_browser_client.h",
+    "browser/test_image_loader.cc",
+    "browser/test_image_loader.h",
+    "browser/test_management_policy.cc",
+    "browser/test_management_policy.h",
+    "browser/test_runtime_api_delegate.cc",
+    "browser/test_runtime_api_delegate.h",
+    "common/extension_builder.cc",
+    "common/extension_builder.h",
+    "common/manifest_test.cc",
+    "common/manifest_test.h",
+    "common/permissions/permission_message_test_util.cc",
+    "common/permissions/permission_message_test_util.h",
+    "common/test_util.cc",
+    "common/test_util.h",
+    "renderer/test_extensions_renderer_client.cc",
+    "renderer/test_extensions_renderer_client.h",
+    "test/background_page_watcher.cc",
+    "test/background_page_watcher.h",
+    "test/extension_test_message_listener.cc",
+    "test/extension_test_message_listener.h",
+    "test/result_catcher.cc",
+    "test/result_catcher.h",
+    "test/test_content_utility_client.cc",
+    "test/test_content_utility_client.h",
+    "test/test_extensions_client.cc",
+    "test/test_extensions_client.h",
+    "test/test_permission_message_provider.cc",
+    "test/test_permission_message_provider.h",
+  ]
 
   # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   deps = [
     ":extensions_resources",
     "//base",
     "//components/cast_certificate:test_support",
     "//components/guest_view/browser:test_support",
     "//components/pref_registry:test_support",
@@ skipping 220 matching lines @@
     "//testing/gtest",
     "//third_party/hunspell",
     "//third_party/icu",
     "//third_party/libpng",
     "//third_party/zlib",
     "//ui/base:test_support",
     "//ui/resources:ui_test_pak",
     "//ui/web_dialogs:test_support",
   ]
 }