Move Windows DPI Code from ui/gfx to ui/display

ui/gfx/win/dpi.h

-// 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_GFX_DPI_WIN_H_
-#define UI_GFX_DPI_WIN_H_
-
-#include "ui/gfx/geometry/size.h"
-#include "ui/gfx/gfx_export.h"
-
-namespace gfx {
-
-// Sets the device scale factor that will be used unless overridden on the
-// command line by --force-device-scale-factor.  If this is not called, and that
-// flag is not used, the scale factor used by the DIP conversion functions below
-// will be that returned by GetDPIScale().
-GFX_EXPORT void SetDefaultDeviceScaleFactor(float scale);
-
-GFX_EXPORT Size GetDPI();
-
-// Gets the scale factor of the display. For example, if the display DPI is
-// 96 then the scale factor is 1.0.  This clamps scale factors <= 1.25 to 1.0 to
-// maintain previous (non-DPI-aware) behavior where only the font size was
-// boosted.
-GFX_EXPORT float GetDPIScale();
-
-namespace win {
-
-// Win32's GetSystemMetrics uses pixel measures. This function calls
-// GetSystemMetrics for the given |metric|, then converts the result to DIP.
-GFX_EXPORT int GetSystemMetricsInDIP(int metric);
-
-}  // namespace win
-}  // namespace gfx
-
-#endif  // UI_GFX_DPI_WIN_H_