It is time.

ui/compositor/test/test_layers.h

Index: ui/compositor/test/test_layers.h
diff --git a/ui/compositor/test/test_layers.h b/ui/compositor/test/test_layers.h
deleted file mode 100644
index 23078083a37310bcee33e23945ba5a74d6e3025c..0000000000000000000000000000000000000000
--- a/ui/compositor/test/test_layers.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright (c) 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_COMPOSITOR_TEST_TEST_LAYERS_H_
-#define UI_COMPOSITOR_TEST_TEST_LAYERS_H_
-
-#include <string>
-
-namespace ui {
-class Layer;
-
-namespace test {
-
-// Returns a string containing the name of each of the child layers (bottommost
-// first) of |parent|. The format of the string is "name1 name2 ..."
-std::string ChildLayerNamesAsString(const ui::Layer& parent);
-
-}  // namespace test
-}  // namespace ui
-
-#endif  // UI_COMPOSITOR_TEST_TEST_LAYERS_H_