Improve settings override bubble to indicate policy installed extensions

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 4b3d579fb92b74bdc38a69e1827b6eda145b11fd..edee7a8286f51acdf461c4faa1b138294e4f54f4 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -3566,6 +3566,7 @@ test("unit_tests") {
       "../browser/ui/content_settings/content_setting_image_model_unittest.cc",
       "../browser/ui/exclusive_access/fullscreen_controller_state_unittest.cc",
       "../browser/ui/extensions/extension_action_view_controller_unittest.cc",
+      "../browser/ui/extensions/extension_message_bubble_bridge_unittest.cc",
       "../browser/ui/global_error/global_error_service_unittest.cc",
       "../browser/ui/omnibox/clipboard_utils_unittest.cc",
       "../browser/ui/omnibox/omnibox_controller_unittest.cc",