| perkj@chromium.org | cd80cce | 2013-12-02 15:19:19 | [diff] [blame] | 1 | // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef CHROME_BROWSER_MEDIA_MEDIA_DEVICE_ID_SALT_H_ |
| 6 | #define CHROME_BROWSER_MEDIA_MEDIA_DEVICE_ID_SALT_H_ |
| 7 | |
| 8 | #include <string> |
| 9 | |
| avi | 6846aef | 2015-12-26 01:09:38 | [diff] [blame] | 10 | #include "base/macros.h" |
| joi@chromium.org | f9583f8 | 2014-02-13 15:34:21 | [diff] [blame] | 11 | #include "base/memory/ref_counted.h" |
| tfarina@chromium.org | f0c8c499 | 2014-05-15 17:37:26 | [diff] [blame] | 12 | #include "components/pref_registry/pref_registry_syncable.h" |
| brettw | b1fc1b8 | 2016-02-02 00:19:08 | [diff] [blame] | 13 | #include "components/prefs/pref_member.h" |
| perkj@chromium.org | cd80cce | 2013-12-02 15:19:19 | [diff] [blame] | 14 | |
| 15 | class PrefService; |
| 16 | |
| 17 | // MediaDeviceIDSalt is responsible for creating and retrieving a salt string |
| 18 | // that is used for creating MediaSource IDs that can be cached by a web |
| 19 | // service. If the cache is cleared, the MediaSourceIds are invalidated. |
| joi@chromium.org | f9583f8 | 2014-02-13 15:34:21 | [diff] [blame] | 20 | // |
| 21 | // The class is reference counted so that it can be used in the |
| 22 | // callback returned by ResourceContext::GetMediaDeviceIDSalt. |
| 23 | class MediaDeviceIDSalt : public base::RefCountedThreadSafe<MediaDeviceIDSalt> { |
| perkj@chromium.org | cd80cce | 2013-12-02 15:19:19 | [diff] [blame] | 24 | public: |
| guidou | 91768ed | 2016-06-15 15:49:51 | [diff] [blame^] | 25 | explicit MediaDeviceIDSalt(PrefService* pref_service); |
| perkj@chromium.org | cd80cce | 2013-12-02 15:19:19 | [diff] [blame] | 26 | void ShutdownOnUIThread(); |
| 27 | |
| 28 | std::string GetSalt() const; |
| 29 | |
| 30 | static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry); |
| 31 | static void Reset(PrefService* pref_service); |
| 32 | |
| 33 | private: |
| joi@chromium.org | f9583f8 | 2014-02-13 15:34:21 | [diff] [blame] | 34 | friend class base::RefCountedThreadSafe<MediaDeviceIDSalt>; |
| 35 | ~MediaDeviceIDSalt(); |
| 36 | |
| perkj@chromium.org | cd80cce | 2013-12-02 15:19:19 | [diff] [blame] | 37 | mutable StringPrefMember media_device_id_salt_; |
| 38 | |
| 39 | DISALLOW_COPY_AND_ASSIGN(MediaDeviceIDSalt); |
| 40 | }; |
| 41 | |
| 42 | #endif // CHROME_BROWSER_MEDIA_MEDIA_DEVICE_ID_SALT_H_ |