Introduce lock_screen_apps to chrome/browser/chromeos

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 bab888ea9eb617963e42f19a29a1e64d90b2d176..3112764fe909b030dd1844ab9722bb13b3a4c9e4 100644
--- a/chrome/browser/chromeos/BUILD.gn
+++ b/chrome/browser/chromeos/BUILD.gn
@@ -706,6 +706,10 @@ source_set("chromeos") {
     "libc_close_tracking.h",
     "locale_change_guard.cc",
     "locale_change_guard.h",
+    "lock_screen_apps/state_controller.cc",
+    "lock_screen_apps/state_controller.h",
+    "lock_screen_apps/state_observer.h",
+    "lock_screen_apps/types.h",
     "login/app_launch_controller.cc",
     "login/app_launch_controller.h",
     "login/app_launch_signin_screen.cc",
@@ -1655,6 +1659,7 @@ source_set("unit_tests") {
     "input_method/input_method_util_unittest.cc",
     "libc_close_tracking_unittest.cc",
     "locale_change_guard_unittest.cc",
+    "lock_screen_apps/state_controller_unittest.cc",
     "login/auth/cryptohome_authenticator_unittest.cc",
     "login/easy_unlock/easy_unlock_challenge_wrapper_unittest.cc",
     "login/easy_unlock/easy_unlock_tpm_key_manager_unittest.cc",