Refactor extension app icon.

chrome/browser/ui/ash/launcher/launcher_extension_app_updater.h

 // Copyright 2016 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_ASH_LAUNCHER_LAUNCHER_EXTENSION_APP_UPDATER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_LAUNCHER_EXTENSION_APP_UPDATER_H_
 
 #include "base/macros.h"
 #include "chrome/browser/ui/app_list/arc/arc_app_list_prefs.h"
 #include "chrome/browser/ui/ash/launcher/launcher_app_updater.h"
 #include "extensions/browser/extension_registry_observer.h"
 
-namespace extensions {
-class ExtensionSet;
-}  // namespace extensions
-
+// TODO (khmel), this is not Launcher class. Consider moving this to proper

[Devlin, 2017/05/01 14:51:11]

nit: s/TODO (khmel), /TODO(khmel): 

[khmel, 2017/05/01 20:18:19]

Done.

+// place.
 class LauncherExtensionAppUpdater
     : public LauncherAppUpdater,
       public extensions::ExtensionRegistryObserver,
       public ArcAppListPrefs::Observer {
  public:
   LauncherExtensionAppUpdater(Delegate* delegate,
                               content::BrowserContext* browser_context);
   ~LauncherExtensionAppUpdater() override;
 
   // ExtensionRegistryObserver:
   void OnExtensionLoaded(content::BrowserContext* browser_context,
                          const extensions::Extension* extension) override;
   void OnExtensionUnloaded(
       content::BrowserContext* browser_context,
       const extensions::Extension* extension,
       extensions::UnloadedExtensionInfo::Reason reason) override;
   void OnExtensionUninstalled(content::BrowserContext* browser_context,
                               const extensions::Extension* extension,
                               extensions::UninstallReason reason) override;
   void OnShutdown(extensions::ExtensionRegistry* registry) override;
 
   // ArcAppListPrefs::Observer
   void OnPackageInstalled(
       const arc::mojom::ArcPackageInfo& package_info) override;
-  void OnPackageRemoved(const std::string& package_name) override;
+  void OnPackageRemoved(const std::string& package_name,
+                        bool uninstalled) override;
+  void OnPackageListInitialRefreshed() override;
 
  private:
   void StartObservingExtensionRegistry();
   void StopObservingExtensionRegistry();
 
-  void UpdateHostedApps();
-  void UpdateHostedApps(const extensions::ExtensionSet& extensions);
-  void UpdateHostedApp(const std::string& app_id);
-  void UpdateEquivalentHostedApp(const std::string& arc_package_name);
+  void UpdateApp(const std::string& app_id);
+  void UpdateEquivalentApp(const std::string& arc_package_name);
 
   extensions::ExtensionRegistry* extension_registry_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(LauncherExtensionAppUpdater);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_LAUNCHER_EXTENSION_APP_UPDATER_H_