mojo api for view based lockscreen

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..bf94e30104d1633fb6b2f2346f9ee69c535918ab 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
@@ -19,6 +19,7 @@ class CastConfigClientMediaRouter;
 class ChromeLauncherController;
 class ChromeNewWindowClient;
 class ChromeShellContentState;
+class LockScreenClientChromeOS;
 class ImmersiveContextMus;
 class ImmersiveHandlerFactoryMus;
 class MediaClient;
@@ -53,6 +54,7 @@ class ChromeBrowserMainExtraPartsAsh : public ChromeBrowserMainExtraParts {
   std::unique_ptr<VolumeController> volume_controller_;
   std::unique_ptr<VpnListForwarder> vpn_list_forwarder_;
   std::unique_ptr<AshInit> ash_init_;
+  std::unique_ptr<LockScreenClientChromeOS> lock_screen_client_;
 
   // These are only used in Mash; corresponding instances are owned by Ash's
   // ShelfController and ChromeShellDelegate in classic Ash.