It is time.

ui/ozone/public/ozone_switches.h

Index: ui/ozone/public/ozone_switches.h
diff --git a/ui/ozone/public/ozone_switches.h b/ui/ozone/public/ozone_switches.h
deleted file mode 100644
index e25c674d73746cfa0109c398cc8abfa5b93594a7..0000000000000000000000000000000000000000
--- a/ui/ozone/public/ozone_switches.h
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2014 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 UI_OZONE_PUBLIC_OZONE_SWITCHES_H_
-#define UI_OZONE_PUBLIC_OZONE_SWITCHES_H_
-
-#include "base/compiler_specific.h"
-#include "ui/ozone/ozone_export.h"
-
-namespace switches {
-
-OZONE_EXPORT extern const char kOzonePlatform[];
-
-OZONE_EXPORT extern const char kOzoneDumpFile[];
-
-OZONE_EXPORT extern const char kOzoneUseSurfaceless[];
-
-OZONE_EXPORT extern const char kOzoneTestSingleOverlaySupport[];
-
-}  // namespace switches
-
-#endif  // UI_OZONE_PUBLIC_OZONE_SWITCHES_H_