Adding status info to DownloadUIItem and piping it through.

components/offline_pages/core/downloads/download_ui_item.cc

 // Copyright 2016 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/offline_pages/core/downloads/download_ui_item.h"
 
 #include "components/offline_pages/core/background/save_page_request.h"
 #include "components/offline_pages/core/offline_page_item.h"
 
 namespace offline_pages {
 
-DownloadUIItem::DownloadUIItem() : total_bytes(0) {}
+DownloadUIItem::DownloadUIItem() : download_progress_bytes(0), total_bytes(0) {}
 
 DownloadUIItem::DownloadUIItem(const OfflinePageItem& page)
     : guid(page.client_id.id),
       url(page.url),
+      download_state(DownloadState::COMPLETE),
+      download_progress_bytes(0),
       title(page.title),
       target_path(page.file_path),
       start_time(page.creation_time),
       total_bytes(page.file_size) {}
 
 DownloadUIItem::DownloadUIItem(const SavePageRequest& request)
     : guid(request.client_id().id),
       url(request.url()),
+      download_progress_bytes(0),  // TODO(dimich) Get this from Request.
       start_time(request.creation_time()),
-      total_bytes(-1L) {}
+      total_bytes(-1L) {
+  switch (request.request_state()) {
+    case SavePageRequest::RequestState::AVAILABLE:
+      download_state = DownloadState::PENDING;
+      break;
+    case SavePageRequest::RequestState::OFFLINING:
+      download_state = DownloadState::IN_PROGRESS;
+      break;
+    case SavePageRequest::RequestState::PAUSED:
+      download_state = DownloadState::PAUSED;
+      break;
+  }
+  // TODO(dimich): Fill in download_progress, add change notifications for it.
+}
 
 DownloadUIItem::DownloadUIItem(const DownloadUIItem& other)
     : guid(other.guid),
       url(other.url),
+      download_state(other.download_state),
+      download_progress_bytes(other.download_progress_bytes),
       title(other.title),
       target_path(other.target_path),
       start_time(other.start_time),
       total_bytes(other.total_bytes) {}
 
 DownloadUIItem::~DownloadUIItem() {}
 
 }  // namespace offline_pages