Add support for pulling icons for OfflineItems

components/offline_items_collection/core/throttled_offline_content_provider.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/throttled_offline_content_provider.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 59 matching lines @@
 }
 
 OfflineContentProvider::OfflineItemList
 ThrottledOfflineContentProvider::GetAllItems() {
   OfflineItemList items = wrapped_provider_->GetAllItems();
   for (auto item : items)
     UpdateItemIfPresent(item);
   return items;
 }
 
+void ThrottledOfflineContentProvider::GetVisualsForItem(
+    const ContentId& id,
+    const VisualsCallback& callback) {
+  wrapped_provider_->GetVisualsForItem(id, callback);
+}
+
 void ThrottledOfflineContentProvider::AddObserver(
     OfflineContentProvider::Observer* observer) {
   DCHECK(observer);
   observers_.AddObserver(observer);
   if (!wrapped_provider_->AreItemsAvailable())
     return;
 
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&ThrottledOfflineContentProvider::NotifyItemsAvailable,
@@ skipping 55 matching lines @@
   update_queued_ = false;
 
   OfflineItemMap updates = std::move(updates_);
   for (auto item_pair : updates) {
     for (auto& observer : observers_)
       observer.OnItemUpdated(item_pair.second);
   }
 }
 
 }  // namespace offline_items_collection