Fix high-DPI on Windows to make use of DIP scaling in WebKit.

ui/base/resource/resource_bundle.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.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 362 matching lines @@
 
   if (image.IsEmpty()) {
     DCHECK(!delegate_ && !data_packs_.empty()) <<
         "Missing call to SetResourcesDataDLL?";
 
     // TODO(oshima): Consider reading the image size from png IHDR chunk and
     // skip decoding here and remove #ifdef below.
     // ResourceBundle::GetSharedInstance() is destroyed after the
     // BrowserMainLoop has finished running. |image_skia| is guaranteed to be
     // destroyed before the resource bundle is destroyed.
-#if defined(OS_CHROMEOS)
+#if defined(OS_CHROMEOS) || defined(ENABLE_HIDPI)
     ui::ScaleFactor scale_factor_to_load = ui::GetMaxScaleFactor();
 #else
     ui::ScaleFactor scale_factor_to_load = ui::SCALE_FACTOR_100P;
 #endif
     gfx::ImageSkia image_skia(new ResourceBundleImageSource(this, resource_id),
                               scale_factor_to_load);
     if (image_skia.isNull()) {
       LOG(WARNING) << "Unable to load image with id " << resource_id;
       NOTREACHED();  // Want to assert in debug mode.
       // The load failed to retrieve the image; show a debugging red square.
@@ skipping 315 matching lines @@
     SkBitmap bitmap;
     bitmap.setConfig(SkBitmap::kARGB_8888_Config, 32, 32);
     bitmap.allocPixels();
     bitmap.eraseARGB(255, 255, 0, 0);
     empty_image_ = gfx::Image(bitmap);
   }
   return empty_image_;
 }
 
 }  // namespace ui