Enable hidpi download UI

chrome/browser/icon_loader_mac.mm

 // 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 "chrome/browser/icon_loader.h"
 
 #import <AppKit/AppKit.h>
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "base/threading/thread.h"
 #include "base/sys_string_conversions.h"
-#include "skia/ext/skia_utils_mac.h"
-#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/gfx/image/image_skia.h"
+#include "ui/gfx/image/image_skia_util_mac.h"
 
 void IconLoader::ReadIcon() {
   NSString* group = base::SysUTF8ToNSString(group_);
   NSWorkspace* workspace = [NSWorkspace sharedWorkspace];
   NSImage* icon = [workspace iconForFileType:group];
 
   if (icon_size_ == ALL) {
     // The NSImage already has all sizes.
     image_.reset(new gfx::Image([icon retain]));
   } else {
     NSSize size = NSZeroSize;
     switch (icon_size_) {
       case IconLoader::SMALL:
         size = NSMakeSize(16, 16);
         break;
       case IconLoader::NORMAL:
         size = NSMakeSize(32, 32);
         break;
       default:
         NOTREACHED();
     }
-    image_.reset(new gfx::Image(gfx::NSImageToSkBitmap(icon, size, false)));
+    image_.reset(new gfx::Image(gfx::ImageSkiaFromResizedNSImage(icon, size)));
   }
 
   target_message_loop_->PostTask(FROM_HERE,
       base::Bind(&IconLoader::NotifyDelegate, this));
 }