Don't request missing favicon on every page request.

chrome/browser/ui/views/create_application_shortcut_view.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_CREATE_APPLICATION_SHORTCUT_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_CREATE_APPLICATION_SHORTCUT_VIEW_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 81 matching lines @@
   virtual bool Accept() OVERRIDE;
 
  private:
   // Fetch the largest unprocessed icon.
   // The first largest icon downloaded and decoded successfully will be used.
   void FetchIcon();
 
   // Favicon download callback.
   void DidDownloadFavicon(
       int id,
+      int http_status_code,
       const GURL& image_url,
       int requested_size,
       const std::vector<SkBitmap>& bitmaps);
 
   // The tab whose URL is being turned into an app.
   content::WebContents* web_contents_;
 
   // Pending app icon download tracked by us.
   int pending_download_id_;
 
@@ skipping 16 matching lines @@
       const ShellIntegration::ShortcutInfo& shortcut_info);
 
   const extensions::Extension* app_;
 
   base::WeakPtrFactory<CreateChromeApplicationShortcutView> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CreateChromeApplicationShortcutView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_CREATE_APPLICATION_SHORTCUT_VIEW_H_