Remove the notificationProvider extension API

extensions/browser/extension_event_histogram_value.h

 // Copyright 2015 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 EXTENSIONS_BROWSER_EXTENSION_EVENT_HISTOGRAM_VALUE_H_
 #define EXTENSIONS_BROWSER_EXTENSION_EVENT_HISTOGRAM_VALUE_H_
 
 namespace extensions {
 namespace events {
 
@@ skipping 190 matching lines @@
   MEDIA_GALLERIES_ON_GALLERY_CHANGED,
   MEDIA_GALLERIES_ON_SCAN_PROGRESS,
   MEDIA_PLAYER_PRIVATE_ON_NEXT_TRACK,
   MEDIA_PLAYER_PRIVATE_ON_PREV_TRACK,
   MEDIA_PLAYER_PRIVATE_ON_TOGGLE_PLAY_STATE,
   NETWORKING_CONFIG_ON_CAPTIVE_PORTAL_DETECTED,
   NETWORKING_PRIVATE_ON_DEVICE_STATE_LIST_CHANGED,
   NETWORKING_PRIVATE_ON_NETWORK_LIST_CHANGED,
   NETWORKING_PRIVATE_ON_NETWORKS_CHANGED,
   NETWORKING_PRIVATE_ON_PORTAL_DETECTION_COMPLETED,
-  NOTIFICATION_PROVIDER_ON_CLEARED,
-  NOTIFICATION_PROVIDER_ON_CREATED,
-  NOTIFICATION_PROVIDER_ON_UPDATED,
+  DELETED_NOTIFICATION_PROVIDER_ON_CLEARED,
+  DELETED_NOTIFICATION_PROVIDER_ON_CREATED,
+  DELETED_NOTIFICATION_PROVIDER_ON_UPDATED,
   NOTIFICATIONS_ON_BUTTON_CLICKED,
   NOTIFICATIONS_ON_CLICKED,
   NOTIFICATIONS_ON_CLOSED,
   NOTIFICATIONS_ON_PERMISSION_LEVEL_CHANGED,
   NOTIFICATIONS_ON_SHOW_SETTINGS,
   OMNIBOX_ON_INPUT_CANCELLED,
   OMNIBOX_ON_INPUT_CHANGED,
   OMNIBOX_ON_INPUT_ENTERED,
   OMNIBOX_ON_INPUT_STARTED,
   PAGE_ACTION_ON_CLICKED,
@@ skipping 202 matching lines @@
   FILE_MANAGER_PRIVATE_ON_APPS_UPDATED,
   // Last entry: Add new entries above, then run:
   // python tools/metrics/histograms/update_extension_histograms.py
   ENUM_BOUNDARY
 };
 
 }  // namespace events
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_EVENT_HISTOGRAM_VALUE_H_