Rename "test" ozone platform to "headless"

ui/ozone/platform/test/ozone_platform_test.h

Index: ui/ozone/platform/test/ozone_platform_test.h
diff --git a/ui/ozone/platform/test/ozone_platform_test.h b/ui/ozone/platform/test/ozone_platform_test.h
deleted file mode 100644
index fb25fd69f557a01cbe209c3f38e3123adbf8e581..0000000000000000000000000000000000000000
--- a/ui/ozone/platform/test/ozone_platform_test.h
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2013 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_PLATFORM_TEST_OZONE_PLATFORM_TEST_H_
-#define UI_OZONE_PLATFORM_TEST_OZONE_PLATFORM_TEST_H_
-
-namespace ui {
-
-class OzonePlatform;
-
-// Constructor hook for use in ozone_platform_list.cc
-OzonePlatform* CreateOzonePlatformTest();
-
-}  // namespace ui
-
-#endif  // UI_OZONE_PLATFORM_TEST_OZONE_PLATFORM_TEST_H_