[Android] Adding content settings provider for notification channels

components/content_settings/core/browser/host_content_settings_map.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.
 
 // Maps hostnames to custom content settings.  Written on the UI thread and read
 // on any thread.  One instance per profile.
 
 #ifndef COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_HOST_CONTENT_SETTINGS_MAP_H_
 #define COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_HOST_CONTENT_SETTINGS_MAP_H_
 
@@ skipping 39 matching lines @@
                                public RefcountedKeyedService {
  public:
   enum ProviderType {
     // EXTENSION names is a layering violation when this class will move to
     // components.
     // TODO(mukai): find the solution.
     INTERNAL_EXTENSION_PROVIDER = 0,
     POLICY_PROVIDER,
     SUPERVISED_PROVIDER,
     CUSTOM_EXTENSION_PROVIDER,
+    NOTIFICATION_ANDROID_PROVIDER,
     PREF_PROVIDER,
     DEFAULT_PROVIDER,
     NUM_PROVIDER_TYPES
   };
 
   // This should be called on the UI thread, otherwise |thread_checker_| handles
   // CalledOnValidThread() wrongly. Only one (or neither) of
   // |is_incognito_profile| and |is_guest_profile| should be true.
   HostContentSettingsMap(PrefService* prefs,
                          bool is_incognito_profile,
@@ skipping 321 matching lines @@
   base::ThreadChecker thread_checker_;
 
   base::ObserverList<content_settings::Observer> observers_;
 
   base::WeakPtrFactory<HostContentSettingsMap> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(HostContentSettingsMap);
 };
 
 #endif  // COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_HOST_CONTENT_SETTINGS_MAP_H_