Refactor extension app icon.

chrome/browser/ui/app_list/extension_app_model_builder.h

 // Copyright 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_APP_LIST_EXTENSION_APP_MODEL_BUILDER_H_
 #define CHROME_BROWSER_UI_APP_LIST_EXTENSION_APP_MODEL_BUILDER_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 40 matching lines @@
   void OnDownloadProgress(const std::string& extension_id,
                           int percent_downloaded) override;
   void OnInstallFailure(const std::string& extension_id) override;
   void OnDisabledExtensionUpdated(
       const extensions::Extension* extension) override;
   void OnShutdown() override;
 
   // LauncherAppUpdater::Delegate:
   void OnAppInstalled(content::BrowserContext* browser_context,
                       const std::string& app_id) override;
-  void OnAppUpdated(content::BrowserContext* browser_context,
-                    const std::string& app_id) override;
   void OnAppUninstalled(content::BrowserContext* browser_context,
                         const std::string& app_id) override;
 
   std::unique_ptr<ExtensionAppItem> CreateAppItem(
       const std::string& extension_id,
       const std::string& extension_name,
       const gfx::ImageSkia& installing_icon,
       bool is_platform_app);
 
   // Populates the model with apps.
@@ skipping 17 matching lines @@
   // We listen to this to show app installing progress.
   extensions::InstallTracker* tracker_ = nullptr;
 
   // Dispatches extension lifecycle events.
   std::unique_ptr<LauncherExtensionAppUpdater> app_updater_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionAppModelBuilder);
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_EXTENSION_APP_MODEL_BUILDER_H_