Introduce ash mojo interface for lock screen action handlers

chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h

Index: chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h
diff --git a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h
index 4589e7e48c1d153b4fc4f4db0de086ed5dcd6626..ad7e6043a56e52a87cd69764b0a735222502a9bb 100644
--- a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h
+++ b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h
@@ -21,6 +21,7 @@ class ChromeNewWindowClient;
 class ChromeShellContentState;
 class ImmersiveContextMus;
 class ImmersiveHandlerFactoryMus;
+class LockScreenActionHandler;
 class MediaClient;
 class SessionControllerClient;
 class SystemTrayClient;
@@ -47,6 +48,7 @@ class ChromeBrowserMainExtraPartsAsh : public ChromeBrowserMainExtraParts {
   std::unique_ptr<MediaClient> media_client_;
   std::unique_ptr<ImmersiveHandlerFactoryMus> immersive_handler_factory_;
   std::unique_ptr<ImmersiveContextMus> immersive_context_;
+  std::unique_ptr<LockScreenActionHandler> lock_screen_action_handler_;
   std::unique_ptr<SessionControllerClient> session_controller_client_;
   std::unique_ptr<SystemTrayClient> system_tray_client_;
   std::unique_ptr<ChromeNewWindowClient> new_window_client_;