Replace usage of NOTIFICATION_EXTENSION_UNLOADED with ExtensionRegistryObserver.

chrome/browser/ui/webui/options/font_settings_handler.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 "chrome/browser/ui/webui/options/font_settings_handler.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/i18n/rtl.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/character_encoding.h"
-#include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/webui/options/font_settings_utils.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/font_list_async.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/web_ui.h"
+#include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/common/extension.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "url/gurl.h"
 
 #if defined(OS_WIN)
 #include "ui/gfx/font.h"
 #include "ui/gfx/platform_font_win.h"
@@ skipping 15 matching lines @@
 }
 
 const char kAdvancedFontSettingsExtensionId[] =
     "caclkomlalccbpcdllchkeecicepbmbm";
 
 }  // namespace
 
 
 namespace options {
 
-FontSettingsHandler::FontSettingsHandler() {
+FontSettingsHandler::FontSettingsHandler()
+    : extension_registry_observer_(this) {
 }
 
 FontSettingsHandler::~FontSettingsHandler() {
 }
 
 void FontSettingsHandler::GetLocalizedValues(
     base::DictionaryValue* localized_strings) {
   DCHECK(localized_strings);
 
   static OptionsStringResource resources[] = {
@@ skipping 28 matching lines @@
 
   GURL install_url(extension_urls::GetWebstoreItemDetailURLPrefix());
   localized_strings->SetString("advancedFontSettingsInstall",
       l10n_util::GetStringFUTF16(
           IDS_FONT_LANGUAGE_SETTING_ADVANCED_FONT_SETTINGS_INSTALL,
           base::UTF8ToUTF16(
               install_url.Resolve(kAdvancedFontSettingsExtensionId).spec())));
 }
 
 void FontSettingsHandler::InitializeHandler() {
-  registrar_.Add(this,
-                 chrome::NOTIFICATION_EXTENSION_LOADED_DEPRECATED,
-                 content::NotificationService::AllSources());
-  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED_DEPRECATED,
-                 content::NotificationService::AllSources());
+  Profile* profile = Profile::FromWebUI(web_ui());
+  extension_registry_observer_.Add(extensions::ExtensionRegistry::Get(profile));
 }
 
 void FontSettingsHandler::InitializePage() {
   DCHECK(web_ui());
   SetUpStandardFontSample();
   SetUpSerifFontSample();
   SetUpSansSerifFontSample();
   SetUpFixedFontSample();
   SetUpMinimumFontSample();
   NotifyAdvancedFontSettingsAvailability();
@@ skipping 39 matching lines @@
                  base::Unretained(this)));
 
   web_ui()->RegisterMessageCallback("fetchFontsData",
       base::Bind(&FontSettingsHandler::HandleFetchFontsData,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("openAdvancedFontSettingsOptions",
       base::Bind(&FontSettingsHandler::HandleOpenAdvancedFontSettingsOptions,
                  base::Unretained(this)));
 }
 
-void FontSettingsHandler::Observe(int type,
-                                  const content::NotificationSource& source,
-                                  const content::NotificationDetails& details) {
-  DCHECK(type == chrome::NOTIFICATION_EXTENSION_LOADED_DEPRECATED ||
-         type == chrome::NOTIFICATION_EXTENSION_UNLOADED_DEPRECATED);
+void FontSettingsHandler::OnExtensionLoaded(
+    content::BrowserContext* browser_context,
+    const extensions::Extension* extension) {
   NotifyAdvancedFontSettingsAvailability();
 }
 
+void FontSettingsHandler::OnExtensionUnloaded(
+    content::BrowserContext* browser_context,
+    const extensions::Extension* extension,
+    extensions::UnloadedExtensionInfo::Reason reason) {
+  NotifyAdvancedFontSettingsAvailability();
+}
+
 void FontSettingsHandler::HandleFetchFontsData(const base::ListValue* args) {
   content::GetFontListAsync(
       base::Bind(&FontSettingsHandler::FontsListHasLoaded,
                  base::Unretained(this)));
 }
 
 void FontSettingsHandler::FontsListHasLoaded(
     scoped_ptr<base::ListValue> list) {
   // Selects the directionality for the fonts in the given list.
   for (size_t i = 0; i < list->GetSize(); i++) {
@@ skipping 112 matching lines @@
       chrome::FindBrowserWithWebContents(web_ui()->GetWebContents()));
 }
 
 void FontSettingsHandler::OnWebKitDefaultFontSizeChanged() {
   SetUpStandardFontSample();
   SetUpSerifFontSample();
   SetUpSansSerifFontSample();
 }
 
 }  // namespace options