Remove ImageLoadingTracker class

chrome/browser/extensions/tab_helper.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_TAB_HELPER_H_
 #define CHROME_BROWSER_EXTENSIONS_TAB_HELPER_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "chrome/browser/extensions/active_tab_permission_granter.h"
 #include "chrome/browser/extensions/app_notify_channel_setup.h"
 #include "chrome/browser/extensions/extension_function_dispatcher.h"
-#include "chrome/browser/extensions/image_loading_tracker.h"
 #include "chrome/common/web_apps.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 struct WebApplicationInfo;
 
 namespace content {
 struct LoadCommittedDetails;
 }
 
+namespace gfx {
+class Image;
+}
+
 namespace extensions {
 class Extension;
 class LocationBarController;
 class RulesRegistryService;
 class ScriptBadgeController;
 class ScriptBubbleController;
 class ScriptExecutor;
 
 // Per-tab extension helper. Also handles non-extension apps.
 class TabHelper : public content::WebContentsObserver,
@@ skipping 150 matching lines @@
                             int callback_id);
   void OnRequest(const ExtensionHostMsg_Request_Params& params);
   void OnContentScriptsExecuting(
       const ScriptExecutionObserver::ExecutingScriptsMap& extension_ids,
       int32 page_id,
       const GURL& on_url);
   void OnWatchedPageChange(const std::vector<std::string>& css_selectors);
 
   // App extensions related methods:
 
-  // Resets app_icon_ and if |extension| is non-null creates a new
-  // ImageLoadingTracker to load the extension's image.
+  // Resets app_icon_ and if |extension| is non-null uses ImageLoader to load
+  // the extension's image asynchronously.
   void UpdateExtensionAppIcon(const Extension* extension);
 
   const Extension* GetExtension(const std::string& extension_app_id);
 
   void OnImageLoaded(const gfx::Image& image);
 
   // WebstoreStandaloneInstaller::Callback.
   virtual void OnInlineInstallComplete(int install_id,
                                        int return_route_id,
                                        bool success,
@@ skipping 55 matching lines @@
 
   // Vend weak pointers that can be invalidated to stop in-progress loads.
   base::WeakPtrFactory<TabHelper> image_loader_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TabHelper);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_TAB_HELPER_H_