Add some .h files under chrome/browser to .gn files.

chrome/browser/chromeos/BUILD.gn

Index: chrome/browser/chromeos/BUILD.gn
diff --git a/chrome/browser/chromeos/BUILD.gn b/chrome/browser/chromeos/BUILD.gn
index 06ee0594e5c8bf822150ddca59687eac6232fa05..a641111a4aaad1e4fb653d9ea23eddf3bb32fd19 100644
--- a/chrome/browser/chromeos/BUILD.gn
+++ b/chrome/browser/chromeos/BUILD.gn
@@ -364,6 +364,7 @@ source_set("chromeos") {
     "camera_presence_notifier.h",
     "certificate_provider/certificate_info.cc",
     "certificate_provider/certificate_info.h",
+    "certificate_provider/certificate_provider.h",
     "certificate_provider/certificate_provider_service.cc",
     "certificate_provider/certificate_provider_service.h",
     "certificate_provider/certificate_provider_service_factory.cc",
@@ -811,6 +812,8 @@ source_set("chromeos") {
     "login/saml/saml_offline_signin_limiter_factory.h",
     "login/screen_manager.cc",
     "login/screen_manager.h",
+    "login/screens/app_launch_splash_screen_view.h",
+    "login/screens/arc_kiosk_splash_screen_view.h",
     "login/screens/arc_terms_of_service_screen.cc",
     "login/screens/arc_terms_of_service_screen.h",
     "login/screens/arc_terms_of_service_screen_view.h",
@@ -877,6 +880,7 @@ source_set("chromeos") {
     "login/screens/update_view.h",
     "login/screens/user_image_screen.cc",
     "login/screens/user_image_screen.h",
+    "login/screens/user_image_view.h",
     "login/screens/user_selection_screen.cc",
     "login/screens/user_selection_screen.h",
     "login/screens/wrong_hwid_screen.cc",
@@ -1077,6 +1081,7 @@ source_set("chromeos") {
     "platform_keys/platform_keys_service.h",
     "platform_keys/platform_keys_service_factory.cc",
     "platform_keys/platform_keys_service_factory.h",
+    "policy/active_directory_join_delegate.h",
     "policy/active_directory_policy_manager.cc",
     "policy/active_directory_policy_manager.h",
     "policy/affiliated_cloud_policy_invalidator.cc",