Add support for OfflinePagesDownloadBridge.

components/offline_pages/downloads/download_ui_item.cc

Index: components/offline_pages/downloads/download_ui_item.cc
diff --git a/components/offline_pages/downloads/download_ui_item.cc b/components/offline_pages/downloads/download_ui_item.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4edd5859237f7dca9e1a504e7767bd27bbb0bf12
--- /dev/null
+++ b/components/offline_pages/downloads/download_ui_item.cc
@@ -0,0 +1,31 @@
+// 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/downloads/download_ui_item.h"
+
+#include "net/base/filename_util.h"
+
+namespace {
+const char kMimeType[] = "multipart/related";
+}
+
+namespace offline_pages {
+
+DownloadUIItem::DownloadUIItem()
+    : mime_type(kMimeType),
+      total_bytes(0) {
+}
+
+DownloadUIItem::DownloadUIItem(const OfflinePageItem& page)
+    : guid(page.client_id.id),
+      url(page.url),
+      target_path(page.file_path),
+      mime_type(kMimeType),
+      start_time_ms(page.creation_time),
+      total_bytes(page.file_size) {}
+
+DownloadUIItem::~DownloadUIItem() {
+}
+
+}  // namespace offline_pages