Remove last dependencies on ui/base from ui/gfx

ui/base/win/dpi_setup.h

+// 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_BASE_WIN_DPI_SETUP_H_
+#define UI_BASE_WIN_DPI_SETUP_H_
+
+#include "ui/base/ui_export.h"
+
+namespace ui {
+namespace win {
+
+// Initializes the device scale factor. If support is enabled, this will set
+// the best available scale based on the screen's pixel density. This can be
+// affected (overridden) by --force-device-scale-factor=x
+// This function can be called only once for the lifetime of a process.
+UI_EXPORT void InitDeviceScaleFactor();
+
+}  // namespace win
+}  // namespace ui
+
+#endif  // UI_BASE_WIN_DPI_SETUP_H_