Revert "chromeos: Move files in //ash/common to //ash, part 2"

ash/wm/focus_rules.h

Index: ash/wm/focus_rules.h
diff --git a/ash/wm/focus_rules.h b/ash/wm/focus_rules.h
deleted file mode 100644
index bd3e62fa89da07738ebaf9d13e9379abe8504759..0000000000000000000000000000000000000000
--- a/ash/wm/focus_rules.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef ASH_WM_FOCUS_RULES_H_
-#define ASH_WM_FOCUS_RULES_H_
-
-#include "ash/ash_export.h"
-
-namespace ash {
-
-class WmWindow;
-
-// These functions provide the ash implementation wm::FocusRules. See
-// description there for details.
-ASH_EXPORT bool IsToplevelWindow(WmWindow* window);
-ASH_EXPORT bool IsWindowConsideredActivatable(WmWindow* window);
-ASH_EXPORT bool IsWindowConsideredVisibleForActivation(WmWindow* window);
-
-}  // namespace ash
-
-#endif  // ASH_WM_FOCUS_RULES_H_