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..0029feab7dcf5cce538bac1a816e7c5196bdf80c 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
@@ -24,6 +24,7 @@ class ImmersiveHandlerFactoryMus;
 class MediaClient;
 class SessionControllerClient;
 class SystemTrayClient;
+class TrayActionHandlerClient;
 class VolumeController;
 class VpnListForwarder;
 
@@ -50,6 +51,7 @@ class ChromeBrowserMainExtraPartsAsh : public ChromeBrowserMainExtraParts {
   std::unique_ptr<SessionControllerClient> session_controller_client_;
   std::unique_ptr<SystemTrayClient> system_tray_client_;
   std::unique_ptr<ChromeNewWindowClient> new_window_client_;
+  std::unique_ptr<TrayActionHandlerClient> tray_action_handler_client_;
   std::unique_ptr<VolumeController> volume_controller_;
   std::unique_ptr<VpnListForwarder> vpn_list_forwarder_;
   std::unique_ptr<AshInit> ash_init_;