Remove PrefObserver usages, batch 13.

chrome/browser/ui/webui/options/media_galleries_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/media_galleries_handler.h"
 
 #include "base/bind.h"
 #include "base/string_number_conversions.h"
 #include "chrome/browser/media_gallery/media_file_system_registry.h"
 #include "chrome/browser/media_gallery/media_galleries_preferences.h"
@@ skipping 34 matching lines @@
                 IDS_MEDIA_GALLERY_MANAGE_TITLE);
 }
 
 void MediaGalleriesHandler::InitializePage() {
   Profile* profile = Profile::FromWebUI(web_ui());
   if (!chrome::MediaGalleriesPreferences::APIHasBeenUsed(profile))
     return;
 
   if (pref_change_registrar_.IsEmpty()) {
     pref_change_registrar_.Init(profile->GetPrefs());
-    pref_change_registrar_.Add(prefs::kMediaGalleriesRememberedGalleries, this);
+    pref_change_registrar_.Add(
+        prefs::kMediaGalleriesRememberedGalleries,
+        base::Bind(&MediaGalleriesHandler::OnGalleriesChanged,
+                   base::Unretained(this)));
   }
 
   OnGalleriesChanged();
 }
 
 void MediaGalleriesHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback(
       "addNewGallery",
       base::Bind(&MediaGalleriesHandler::HandleAddNewGallery,
                  base::Unretained(this)));
@@ skipping 49 matching lines @@
     NOTREACHED();
     return;
   }
 
   chrome::MediaGalleriesPreferences* prefs =
       chrome::MediaFileSystemRegistry::GetInstance()->GetPreferences(
           Profile::FromWebUI(web_ui()));
   prefs->ForgetGalleryById(id);
 }
 
-void MediaGalleriesHandler::FileSelected(
-    const FilePath& path, int index, void* params) {
+void MediaGalleriesHandler::FileSelected(const FilePath& path,
+                                         int index,
+                                         void* params) {
   chrome::MediaGalleriesPreferences* prefs =
       chrome::MediaFileSystemRegistry::GetInstance()->GetPreferences(
           Profile::FromWebUI(web_ui()));
   prefs->AddGalleryByPath(path);
 }
 
-void MediaGalleriesHandler::OnPreferenceChanged(PrefServiceBase* service,
-                                                const std::string& pref_name) {
-  DCHECK_EQ(std::string(prefs::kMediaGalleriesRememberedGalleries), pref_name);
-  OnGalleriesChanged();
-}
-
 }  // namespace options