Migrate Obsolete NotificationsSettings and remove content_settings::NotificationsProvider.

chrome/common/pref_names.h

 // Copyright (c) 2011 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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 #pragma once
 
@@ skipping 242 matching lines @@
 extern const char kPluginsShowDetails[];
 extern const char kPluginsAllowOutdated[];
 extern const char kPluginsAlwaysAuthorize[];
 extern const char kCheckDefaultBrowser[];
 extern const char kDefaultBrowserSettingEnabled[];
 #if defined(OS_MACOSX)
 extern const char kShowUpdatePromotionInfoBar[];
 #endif
 extern const char kUseCustomChromeFrame[];
 extern const char kShowOmniboxSearchHint[];
-extern const char kDesktopNotificationDefaultContentSetting[];
-extern const char kDesktopNotificationAllowedOrigins[];
-extern const char kDesktopNotificationDeniedOrigins[];
+extern const char kDesktopNotificationDefaultContentSetting[];  // OBSOLETE
+extern const char kDesktopNotificationAllowedOrigins[];  // OBSOLETE
+extern const char kDesktopNotificationDeniedOrigins[];  // OBSOLETE
 extern const char kDesktopNotificationPosition[];
 extern const char kDefaultContentSettings[];
 extern const char kPerHostContentSettings[];  // OBSOLETE
 extern const char kContentSettingsVersion[];
 extern const char kContentSettingsPatterns[];  // OBSOLETE
 extern const char kContentSettingsPatternPairs[];
 extern const char kBlockThirdPartyCookies[];
 extern const char kClearSiteDataOnExit[];
 extern const char kDefaultZoomLevel[];
 extern const char kPerHostZoomLevels[];
@@ skipping 308 matching lines @@
 
 extern const char kUserCreatedLoginItem[];
 extern const char kBackgroundModeEnabled[];
 
 extern const char kDevicePolicyRefreshRate[];
 extern const char kUserPolicyRefreshRate[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_