[Android] Adding content settings provider for notification channels

components/content_settings/core/browser/host_content_settings_map.cc

 // 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.
 
 #include "components/content_settings/core/browser/host_content_settings_map.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 37 matching lines @@
 struct ProviderNamesSourceMapEntry {
   const char* provider_name;
   content_settings::SettingSource provider_source;
 };
 
 const ProviderNamesSourceMapEntry kProviderNamesSourceMap[] = {
     {"platform_app", content_settings::SETTING_SOURCE_EXTENSION},
     {"policy", content_settings::SETTING_SOURCE_POLICY},
     {"supervised_user", content_settings::SETTING_SOURCE_SUPERVISED},
     {"extension", content_settings::SETTING_SOURCE_EXTENSION},
+    {"notification_android", content_settings::SETTING_SOURCE_USER},
     {"preference", content_settings::SETTING_SOURCE_USER},
     {"default", content_settings::SETTING_SOURCE_USER},
 };
 
 // Enum describing the status of domain to origin migration of content settings.
 // Migration will be done twice: once upon construction of the
 // HostContentSettingsMap (before syncing any content settings) and once after
 // sync has finished. We always migrate before sync to ensure that settings will
 // get migrated even if a user doesn't have sync enabled. We migrate after sync
 // to ensure that any sync'd settings will be migrated. Once these events have
@@ skipping 309 matching lines @@
 }
 
 void HostContentSettingsMap::SetWebsiteSettingCustomScope(
     const ContentSettingsPattern& primary_pattern,
     const ContentSettingsPattern& secondary_pattern,
     ContentSettingsType content_type,
     const std::string& resource_identifier,
     std::unique_ptr<base::Value> value) {
   DCHECK(SupportsResourceIdentifier(content_type) ||
          resource_identifier.empty());
+  // TODO(crbug.com/731126): Verify that assumptions for notification content
+  // settings are met.
   UsedContentSettingsProviders();
 
   for (const auto& provider_pair : content_settings_providers_) {
     if (provider_pair.second->SetWebsiteSetting(
             primary_pattern, secondary_pattern, content_type,
             resource_identifier, value.get())) {
       // If successful then ownership is passed to the provider.
       ignore_result(value.release());
       return;
     }
@@ skipping 506 matching lines @@
         return base::WrapUnique(rule.value.get()->DeepCopy());
       }
     }
   }
   return std::unique_ptr<base::Value>();
 }
 
 void HostContentSettingsMap::SetClockForTesting(
     std::unique_ptr<base::Clock> clock) {
   pref_provider_->SetClockForTesting(std::move(clock));
-}
+}