[Media Galleries] Lazily initialize the storage monitor.

chrome/browser/media_galleries/media_galleries_dialog_controller.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/media_galleries/media_galleries_dialog_controller.h"
 
 #include "base/i18n/time_formatting.h"
 #include "base/path_service.h"
 #include "base/stl_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 46 matching lines @@
 
 MediaGalleriesDialogController::MediaGalleriesDialogController(
     content::WebContents* web_contents,
     const Extension& extension,
     const base::Closure& on_finish)
       : web_contents_(web_contents),
         extension_(&extension),
         on_finish_(on_finish) {
   MediaFileSystemRegistry* registry =
       g_browser_process->media_file_system_registry();
-  preferences_ = registry->GetPreferences(
-      Profile::FromBrowserContext(web_contents->GetBrowserContext()));
+  registry->GetPreferencesAsync(
+      Profile::FromBrowserContext(web_contents->GetBrowserContext()),
+      base::Bind(&MediaGalleriesDialogController::Init,
+                 base::Unretained(this)));
+}
+
+void MediaGalleriesDialogController::Init(
+    MediaGalleriesPreferences* preferences) {
+  preferences_ = preferences;
   InitializePermissions();
 
   dialog_.reset(MediaGalleriesDialog::Create(this));
 
   StorageMonitor* monitor = StorageMonitor::GetInstance();
   if (monitor)
     monitor->AddObserver(this);
 
   preferences_->AddGalleryChangeObserver(this);
 }
@@ skipping 374 matching lines @@
     if (iter->pref_info.device_id == device_id)
       dialog_->UpdateGallery(iter->pref_info, iter->allowed);
   }
 }
 
 // MediaGalleries dialog -------------------------------------------------------
 
 MediaGalleriesDialog::~MediaGalleriesDialog() {}
 
 }  // namespace chrome