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

ui/base/resource/resource_bundle_win.cc

 // 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.
 
 #include "ui/base/resource/resource_bundle_win.h"
 
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "skia/ext/image_operations.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/resource/resource_data_dll_win.h"
+#include "ui/gfx/dpi.h"
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/image/image_skia_source.h"
-#include "ui/gfx/win/dpi.h"
 
 namespace ui {
 
 namespace {
 
 HINSTANCE resources_data_dll;
 
 HINSTANCE GetCurrentResourceDLL() {
   if (resources_data_dll)
     return resources_data_dll;
@@ skipping 39 matching lines @@
 
 void SetResourcesDataDLL(HINSTANCE handle) {
   resources_data_dll = handle;
 }
 
 HICON LoadThemeIconFromResourcesDataDLL(int icon_id) {
   return ::LoadIcon(GetCurrentResourceDLL(), MAKEINTRESOURCE(icon_id));
 }
 
 }  // namespace ui;