Media Galleries Partial Deprecation: Remove scan functionality.

chrome/browser/media_galleries/media_galleries_preferences.h

 // 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.
 
 #ifndef CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_GALLERIES_PREFERENCES_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_GALLERIES_PREFERENCES_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 255 matching lines @@
       const extensions::Extension& extension);
 
   // Returns true if the permission changed. Returns false if there was
   // no change.
   bool SetGalleryPermissionForExtension(const extensions::Extension& extension,
                                         MediaGalleryPrefId pref_id,
                                         bool has_permission);
 
   const MediaGalleriesPrefInfoMap& known_galleries() const;
 
-  // These keep track of when we last successfully completed a media scan.
-  // This is used to provide cached results when appropriate.
-  base::Time GetLastScanCompletionTime() const;
-  void SetLastScanCompletionTime(const base::Time& time);
-
   // KeyedService implementation:
   void Shutdown() override;
 
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
   // Returns true if the media gallery preferences system has ever been used
   // for this profile. To be exact, it checks if a gallery has ever been added
   // (including defaults).
   static bool APIHasBeenUsed(Profile* profile);
 
@@ skipping 106 matching lines @@
   DeviceIdPrefIdsMap device_map_;
 
   base::ObserverList<GalleryChangeObserver> gallery_change_observers_;
 
   base::WeakPtrFactory<MediaGalleriesPreferences> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaGalleriesPreferences);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_GALLERIES_PREFERENCES_H_