Add support for pulling icons for OfflineItems

components/offline_items_collection/core/offline_content_aggregator.cc

Index: components/offline_items_collection/core/offline_content_aggregator.cc
diff --git a/components/offline_items_collection/core/offline_content_aggregator.cc b/components/offline_items_collection/core/offline_content_aggregator.cc
index acbfd5a130b4ed2daf7b2eeb38d6e895071695ef..19eaa574efe84bda5c98a87a569c7a2172fb004a 100644
--- a/components/offline_items_collection/core/offline_content_aggregator.cc
+++ b/components/offline_items_collection/core/offline_content_aggregator.cc
@@ -145,6 +145,20 @@ OfflineContentAggregator::GetAllItems() {
   return items;
 }
 
+void OfflineContentAggregator::GetVisualsForItem(
+    const ContentId& id,
+    const VisualsCallback& callback) {
+  auto it = providers_.find(id.name_space);
+
+  if (it == providers_.end()) {
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
+        FROM_HERE, base::Bind(callback, id, nullptr));
+    return;
+  }
+
+  it->second->GetVisualsForItem(id, callback);
+}
+
 void OfflineContentAggregator::AddObserver(
     OfflineContentProvider::Observer* observer) {
   DCHECK(observer);