Enable hidpi on Linux, refactor a bit on Windows to share

ash/display/display_info.cc

 // 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.
 
 #include <stdio.h>
 #include <string>
 #include <vector>
 
 #include "ash/display/display_info.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "ui/gfx/display.h"
+#include "ui/gfx/dpi.h"
 #include "ui/gfx/size_conversions.h"
 #include "ui/gfx/size_f.h"
 
 #if defined(OS_WIN)
 #include "ui/aura/window_tree_host.h"
-#include "ui/gfx/win/dpi.h"
 #endif
 
 namespace ash {
 namespace {
 
 bool use_125_dsf_for_ui_scaling = false;
 
 // Check the content of |spec| and fill |bounds| and |device_scale_factor|.
 // Returns true when |bounds| is found.
 bool GetDisplayBounds(
@@ skipping 349 matching lines @@
 }
 
 bool DisplayInfo::IsColorProfileAvailable(
     ui::ColorCalibrationProfile profile) const {
   return std::find(available_color_profiles_.begin(),
                    available_color_profiles_.end(),
                    profile) != available_color_profiles_.end();
 }
 
 }  // namespace ash