Add support for pulling icons for OfflineItems

components/offline_items_collection/core/offline_item.cc

 // Copyright 2017 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_items_collection/core/offline_item.h"
 
 namespace offline_items_collection {
 
 ContentId::ContentId() = default;
 
@@ skipping 51 matching lines @@
          original_url == offline_item.original_url &&
          is_off_the_record == offline_item.is_off_the_record &&
          state == offline_item.state &&
          is_resumable == offline_item.is_resumable &&
          allow_metered == offline_item.allow_metered &&
          received_bytes == offline_item.received_bytes &&
          percent_completed == offline_item.percent_completed &&
          time_remaining_ms == offline_item.time_remaining_ms;
 }
 
+OfflineItemVisuals::OfflineItemVisuals() = default;
+OfflineItemVisuals::OfflineItemVisuals(const OfflineItemVisuals& other) =
+    default;
+OfflineItemVisuals::~OfflineItemVisuals() = default;
+
 }  // namespace offline_items_collection