Made it possible to tell whether an extension is being installed or updated.

apps/shortcut_manager.cc

 // 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.
 
 #include "apps/shortcut_manager.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/shell_integration.h"
 #include "chrome/browser/ui/web_applications/web_app_ui.h"
@@ skipping 16 matching lines @@
 }
 
 ShortcutManager::~ShortcutManager() {}
 
 void ShortcutManager::Observe(int type,
                                  const content::NotificationSource& source,
                                  const content::NotificationDetails& details) {
   switch (type) {
     case chrome::NOTIFICATION_EXTENSION_INSTALLED: {
 #if !defined(OS_MACOSX)
-      const Extension* extension = content::Details<const Extension>(
-          details).ptr();
+      const Extension* extension =
+          content::Details<const extensions::InstalledExtensionInfo>(details)->
+              extension;
       if (extension->is_platform_app() &&
           extension->location() != extensions::Manifest::COMPONENT) {
         web_app::UpdateShortcutInfoAndIconForApp(*extension, profile_,
           base::Bind(&web_app::UpdateAllShortcuts));
       }
 #endif  // !defined(OS_MACOSX)
       break;
     }
     case chrome::NOTIFICATION_EXTENSION_UNINSTALLED: {
       const Extension* extension = content::Details<const Extension>(
           details).ptr();
       DeleteApplicationShortcuts(extension);
       break;
     }
     default:
       NOTREACHED();
   }
 }
 
 void ShortcutManager::DeleteApplicationShortcuts(
     const Extension* extension) {
   ShellIntegration::ShortcutInfo delete_info =
       web_app::ShortcutInfoForExtensionAndProfile(extension, profile_);
   web_app::DeleteAllShortcuts(delete_info);
 }
 
 }  // namespace apps