Use ImageLoader instead of ImageLoadingTracker (Part 9)

chrome/browser/extensions/image_loading_tracker.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_EXTENSIONS_IMAGE_LOADING_TRACKER_H_
 #define CHROME_BROWSER_EXTENSIONS_IMAGE_LOADING_TRACKER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 113 matching lines @@
   // Returns the ID used for the next image that is loaded. That is, the return
   // value from this method corresponds to the int that is passed to
   // OnImageLoaded() the next time LoadImage() is invoked.
   int next_id() const { return next_id_; }
 
  private:
   // This class is deprecated. This just lists all currently remaining
   // usage of this class, so once this list is empty this class can and
   // should be removed.
   friend class ExtensionInfoBar;
-  friend class Panel;
   friend class extensions::IconImage;
   friend class extensions::TabHelper;
   FRIEND_TEST_ALL_PREFIXES(ImageLoadingTrackerTest, Cache);
   FRIEND_TEST_ALL_PREFIXES(ImageLoadingTrackerTest,
                            DeleteExtensionWhileWaitingForCache);
   FRIEND_TEST_ALL_PREFIXES(ImageLoadingTrackerTest, MultipleImages);
 
   explicit ImageLoadingTracker(Observer* observer);
 
   // Information for pending resource load operation for one or more image
@@ skipping 42 matching lines @@
   // Information for each LoadImage request is cached here. The integer
   // identifies the id assigned to the request.
   LoadMap load_map_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageLoadingTracker);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_IMAGE_LOADING_TRACKER_H_