Introduce ash mojo interface for lock screen action handlers

chrome/browser/chromeos/lock_screen_apps/state_observer.h

Index: chrome/browser/chromeos/lock_screen_apps/state_observer.h
diff --git a/chrome/browser/chromeos/lock_screen_apps/state_observer.h b/chrome/browser/chromeos/lock_screen_apps/state_observer.h
index fc16b6d56c8e9fbc9998dbe204b453ee20def124..fe1ede3e82e1849c7b03df67ef3b4b6d780e130d 100644
--- a/chrome/browser/chromeos/lock_screen_apps/state_observer.h
+++ b/chrome/browser/chromeos/lock_screen_apps/state_observer.h
@@ -5,7 +5,7 @@
 #ifndef CHROME_BROWSER_CHROMEOS_LOCK_SCREEN_APPS_STATE_OBSERVER_H_
 #define CHROME_BROWSER_CHROMEOS_LOCK_SCREEN_APPS_STATE_OBSERVER_H_
 
-#include "chrome/browser/chromeos/lock_screen_apps/types.h"
+#include "ash/public/interfaces/tray_action.mojom.h"
 
 namespace lock_screen_apps {
 
@@ -16,9 +16,8 @@ class StateObserver {
 
   // Invoked when the state of support for app provided lock screen actions
   // changes.
-  // |states|: Maps actions supported by the platform to their current state.
-  virtual void OnLockScreenAppsStateChanged(Action action,
-                                            ActionState state) = 0;
+  virtual void OnLockScreenNoteStateChanged(
+      ash::mojom::TrayActionState state) = 0;
 };
 
 }  // namespace lock_screen_apps