Enable hidpi download UI

chrome/browser/icon_loader.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_ICON_LOADER_H_
 #define CHROME_BROWSER_ICON_LOADER_H_
 
 #include "build/build_config.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop_proxy.h"
 #include "ui/gfx/image/image.h"
 
 #if defined(OS_WIN)
 // On Windows, we group files by their extension, with several exceptions:
 // .dll, .exe, .ico. See IconManager.h for explanation.
 typedef std::wstring IconGroupID;
 #elif defined(OS_POSIX)
 // On POSIX, we group files by MIME type.
 typedef std::string IconGroupID;
 #endif
 
 ////////////////////////////////////////////////////////////////////////////////
 //
 // A facility to read a file containing an icon asynchronously in the IO
-// thread. Returns the icon in the form of an SkBitmap.
+// thread. Returns the icon in the form of an ImageSkia.
 //
 ////////////////////////////////////////////////////////////////////////////////
 class IconLoader : public base::RefCountedThreadSafe<IconLoader> {
  public:
   enum IconSize {
     SMALL = 0,  // 16x16
     NORMAL,     // 32x32
     LARGE,      // Windows: 32x32, Linux: 48x48, Mac: Unsupported
     ALL,        // All sizes available
   };
 
   class Delegate {
    public:
     // Invoked when an icon has been read. |source| is the IconLoader. If the
     // icon has been successfully loaded, result is non-null. This method must
-    // return true if it is taking ownership of the returned bitmap.
+    // return true if it is taking ownership of the returned image.
     virtual bool OnImageLoaded(IconLoader* source, gfx::Image* result) = 0;
 
    protected:
     virtual ~Delegate() {}
   };
 
   IconLoader(const IconGroupID& group, IconSize size, Delegate* delegate);
 
   // Start reading the icon on the file thread.
   void Start();
@@ skipping 15 matching lines @@
   IconSize icon_size_;
 
   scoped_ptr<gfx::Image> image_;
 
   Delegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(IconLoader);
 };
 
 #endif  // CHROME_BROWSER_ICON_LOADER_H_