Implement progress bar spec (determinate and indeterminate).

chrome/browser/download/notification/download_item_notification.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 "chrome/browser/download/notification/download_item_notification.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/files/file_util.h"
@@ skipping 369 matching lines @@
   } else {
     switch (item_->GetState()) {
       case content::DownloadItem::IN_PROGRESS: {
         int percent_complete = item_->PercentComplete();
         if (percent_complete >= 0) {
           notification_->set_progress(percent_complete);
         } else {
           // Negative progress value shows an indeterminate progress bar.
           notification_->set_progress(-1);
         }
+
         notification_->set_type(message_center::NOTIFICATION_TYPE_PROGRESS);
         break;
       }
       case content::DownloadItem::COMPLETE:
         DCHECK(item_->IsDone());
         notification_->set_priority(message_center::DEFAULT_PRIORITY);
         notification_->set_type(message_center::NOTIFICATION_TYPE_BASE_FORMAT);
         notification_->set_progress(100);
         break;
       case content::DownloadItem::CANCELLED:
@@ skipping 535 matching lines @@
   const std::string notification_id_in_message_center = notification->id();
 
   message_center::NotificationList::Notifications visible_notifications =
       message_center_->GetVisibleNotifications();
   for (auto* notification : visible_notifications) {
     if (notification->id() == notification_id_in_message_center)
       return true;
   }
   return false;
 }