It is time.

ui/aura/test/test_window_tree_client.h

Index: ui/aura/test/test_window_tree_client.h
diff --git a/ui/aura/test/test_window_tree_client.h b/ui/aura/test/test_window_tree_client.h
deleted file mode 100644
index 8856a9f9449a0e91a2e99fe1d09c5239c33b7be3..0000000000000000000000000000000000000000
--- a/ui/aura/test/test_window_tree_client.h
+++ /dev/null
@@ -1,34 +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_AURA_TEST_TEST_WINDOW_TREE_CLIENT_H_
-#define UI_AURA_TEST_TEST_WINDOW_TREE_CLIENT_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "ui/aura/aura_export.h"
-#include "ui/aura/client/window_tree_client.h"
-
-namespace aura {
-namespace test {
-
-class TestWindowTreeClient : public client::WindowTreeClient {
- public:
-  explicit TestWindowTreeClient(Window* root_window);
-  virtual ~TestWindowTreeClient();
-
-  // Overridden from client::WindowTreeClient:
-  virtual Window* GetDefaultParent(Window* context,
-                                   Window* window,
-                                   const gfx::Rect& bounds) override;
- private:
-  Window* root_window_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestWindowTreeClient);
-};
-
-}  // namespace test
-}  // namespace aura
-
-#endif  // UI_AURA_TEST_TEST_WINDOW_TREE_CLIENT_H_