mash: remove the LockStateControllerDelegate.

ash/test/BUILD.gn

Index: ash/test/BUILD.gn
diff --git a/ash/test/BUILD.gn b/ash/test/BUILD.gn
index e804ea51728ab40b2eae4b206fe999c6d337ca46..6f8358136a5a7f6a53d642f1446c38bd542e45a2 100644
--- a/ash/test/BUILD.gn
+++ b/ash/test/BUILD.gn
@@ -103,8 +103,6 @@ static_library("test_support_common") {
     "test_activation_delegate.h",
     "test_keyboard_ui.cc",
     "test_keyboard_ui.h",
-    "test_lock_state_controller_delegate.cc",
-    "test_lock_state_controller_delegate.h",
     "test_overlay_delegate.cc",
     "test_overlay_delegate.h",
     "test_screenshot_delegate.cc",
@@ -113,6 +111,8 @@ static_library("test_support_common") {
     "test_session_state_animator.h",
     "test_shell_delegate.cc",
     "test_shell_delegate.h",
+    "test_shutdown_client.cc",
+    "test_shutdown_client.h",
     "test_suite.cc",
     "test_suite.h",
     "test_suite_init.h",
@@ -137,6 +137,7 @@ static_library("test_support_common") {
   deps = [
     "//ash/common/test:test_support",
     "//ash/public/cpp",
+    "//ash/public/interfaces",
     "//ash/resources",
     "//base:i18n",
     "//base/test:test_support",