Notification actions may have an icon url.

content/browser/notifications/notification_database_data_conversions.cc

 // 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.
 
 #include "content/browser/notifications/notification_database_data_conversions.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 50 matching lines @@
 
   if (payload.data().length()) {
     notification_data->data.assign(payload.data().begin(),
                                    payload.data().end());
   }
 
   for (const auto& payload_action : payload.actions()) {
     PlatformNotificationAction action;
     action.action = payload_action.action();
     action.title = base::UTF8ToUTF16(payload_action.title());
+    action.icon = GURL(payload_action.icon());
     notification_data->actions.push_back(action);
   }
 
   return true;
 }
 
 bool SerializeNotificationDatabaseData(const NotificationDatabaseData& input,
                                        std::string* output) {
   DCHECK(output);
 
@@ skipping 33 matching lines @@
   if (notification_data.data.size()) {
     payload->set_data(&notification_data.data.front(),
                       notification_data.data.size());
   }
 
   for (const PlatformNotificationAction& action : notification_data.actions) {
     NotificationDatabaseDataProto::NotificationAction* payload_action =
         payload->add_actions();
     payload_action->set_action(action.action);
     payload_action->set_title(base::UTF16ToUTF8(action.title));
+    payload_action->set_icon(action.icon.spec());
   }
 
   NotificationDatabaseDataProto message;
   message.set_notification_id(input.notification_id);
   message.set_origin(input.origin.spec());
   message.set_service_worker_registration_id(
       input.service_worker_registration_id);
   message.set_allocated_notification_data(payload.release());
 
   return message.SerializeToString(output);
 }
 
 }  // namespace content