Remove unneeded IconLoader::image_

chrome/browser/icon_loader_chromeos.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 "chrome/browser/icon_loader.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
 #include "chrome/grit/theme_resources.h"
 #include "media/media_features.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/codec/png_codec.h"
@@ skipping 168 matching lines @@
 }
 
 void IconLoader::ReadIcon() {
   static base::LazyInstance<IconMapper>::Leaky icon_mapper =
       LAZY_INSTANCE_INITIALIZER;
   int idr = icon_mapper.Get().Lookup(group_, icon_size_);
   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
   gfx::ImageSkia image_skia(ResizeImage(*(rb.GetImageNamed(idr)).ToImageSkia(),
                                         IconSizeToDIPSize(icon_size_)));
   image_skia.MakeThreadSafe();
-  image_.reset(new gfx::Image(image_skia));
+  std::unique_ptr<gfx::Image> image = base::MakeUnique<gfx::Image>(image_skia);
   target_task_runner_->PostTask(
-      FROM_HERE, base::Bind(callback_, base::Passed(&image_), group_));
+      FROM_HERE, base::Bind(callback_, base::Passed(&image), group_));
   delete this;
 }