Fix Chrome OS shelf locking for chromebook lid open/close.

ash/shelf/shelf_locking_manager.h

Index: ash/shelf/shelf_locking_manager.h
diff --git a/ash/shelf/shelf_locking_manager.h b/ash/shelf/shelf_locking_manager.h
index 73878e203c989c9af0f303a4616dc03db006656c..24be7d42e191efb0d7f1206b5c569ba32995061f 100644
--- a/ash/shelf/shelf_locking_manager.h
+++ b/ash/shelf/shelf_locking_manager.h
@@ -23,6 +23,9 @@ class ASH_EXPORT ShelfLockingManager : public ShellObserver,
   explicit ShelfLockingManager(Shelf* shelf);
   ~ShelfLockingManager() override;
 
+  bool is_locked() const { return session_locked_ || screen_locked_; }
+  void set_stored_alignment(ShelfAlignment value) { stored_alignment_ = value; }
+
   // ShellObserver:
   void OnLockStateChanged(bool locked) override;