It is time.

ui/views/widget/widget_hwnd_utils.h

Index: ui/views/widget/widget_hwnd_utils.h
diff --git a/ui/views/widget/widget_hwnd_utils.h b/ui/views/widget/widget_hwnd_utils.h
deleted file mode 100644
index 09ee0abe138b9dbcdcddaa24f58084c40ae7551d..0000000000000000000000000000000000000000
--- a/ui/views/widget/widget_hwnd_utils.h
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright (c) 2012 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_VIEWS_WIDGET_WIDGET_HWND_UTILS_H_
-#define UI_VIEWS_WIDGET_WIDGET_HWND_UTILS_H_
-
-#include <windows.h>
-
-#include "ui/views/widget/widget.h"
-
-// Functions shared by hwnd_message_handler.cc and
-// desktop_window_tree_host_win.cc:
-
-namespace views {
-class HWNDMessageHandler;
-class WidgetDelegate;
-namespace internal {
-class NativeWidgetDelegate;
-}
-
-// Returns true if the WINDOWPOS data provided indicates the client area of
-// the window may have changed size. This can be caused by the window being
-// resized or its frame changing.
-bool DidClientAreaSizeChange(const WINDOWPOS* window_pos);
-
-// Sets styles appropriate for |params| on |handler|.
-void ConfigureWindowStyles(
-    HWNDMessageHandler* handler,
-    const Widget::InitParams& params,
-    WidgetDelegate* widget_delegate,
-    internal::NativeWidgetDelegate* native_widget_delegate);
-
-}  // namespace views
-
-#endif  // UI_VIEWS_WIDGET_WIDGET_HWND_UTILS_H_