Remove win8/metro_driver

win8/metro_driver/display_properties.cc

-// Copyright 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.
-
-#include "stdafx.h"
-
-#include <windows.h>
-#include <wrl\implements.h>
-#include <wrl\wrappers\corewrappers.h>
-#include <windows.foundation.h>
-#include <windows.graphics.display.h>
-#include "base/win/windows_version.h"
-#include "ui/gfx/win/dpi.h"
-#include "winrt_utils.h"
-
-float GetModernUIScale() {
-  if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
-    Microsoft::WRL::ComPtr<
-        ABI::Windows::Graphics::Display::IDisplayPropertiesStatics>
-        display_properties;
-    if (SUCCEEDED(winrt_utils::CreateActivationFactory(
-        RuntimeClass_Windows_Graphics_Display_DisplayProperties,
-        display_properties.GetAddressOf()))) {
-      ABI::Windows::Graphics::Display::ResolutionScale resolution_scale;
-      if (SUCCEEDED(display_properties->get_ResolutionScale(&resolution_scale)))
-        return static_cast<float>(resolution_scale) / 100.0f;
-    }
-  }
-  return gfx::GetDPIScale();
-}