move favicon download code from chrome/ into content/

chrome/browser/ui/views/ash/balloon_view_ash.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_ASH_BALLOON_VIEW_ASH_H_
 #define CHROME_BROWSER_UI_VIEWS_ASH_BALLOON_VIEW_ASH_H_
 
-#include <map>
+#include <vector>
 
-#include "chrome/browser/favicon/favicon_download_helper_delegate.h"
+#include "base/memory/weak_ptr.h"
 #include "chrome/browser/notifications/balloon.h"
 
-class FaviconDownloadHelper;
+class GURL;
+class SkBitmap;
 
 // On Ash, a "BalloonView" is just a wrapper for ash notification entries.
-class BalloonViewAsh : public BalloonView,
-                       public FaviconDownloadHelperDelegate {
+class BalloonViewAsh : public BalloonView {
  public:
   explicit BalloonViewAsh(BalloonCollection* collection);
   virtual ~BalloonViewAsh();
 
   // BalloonView interface.
   virtual void Show(Balloon* balloon) OVERRIDE;
   virtual void Update() OVERRIDE;
   virtual void RepositionToBalloon() OVERRIDE;
   virtual void Close(bool by_user) OVERRIDE;
   virtual gfx::Size GetSize() const OVERRIDE;
   virtual BalloonHost* GetHost() const OVERRIDE;
 
-  // FaviconDownloadHelperDelegate interface:
-  virtual void OnDidDownloadFavicon(
+ private:
+  // Favicon download callback.
+  void DidDownloadFavicon(
       int id,
       const GURL& image_url,
       bool errored,
       int requested_size,
-      const std::vector<SkBitmap>& bitmaps) OVERRIDE;
-
- private:
+      const std::vector<SkBitmap>& bitmaps);
   void FetchIcon(const Notification& notification);
   std::string GetExtensionId(Balloon* balloon);
 
   BalloonCollection* collection_;
   Balloon* balloon_;
-  scoped_ptr<FaviconDownloadHelper> icon_fetcher_;
 
   // Track the current notification id and download id so that it can be updated
   // properly.
   int current_download_id_;
   std::string current_notification_id_;
   std::string cached_notification_id_;
+  base::WeakPtrFactory<BalloonViewAsh> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BalloonViewAsh);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_ASH_BALLOON_VIEW_ASH_H_