[Offline pages] Adapting OfflinePageDownloadBridge to DownloadUIAdapter

components/offline_pages/offline_page_model_impl.h

Index: components/offline_pages/offline_page_model_impl.h
diff --git a/components/offline_pages/offline_page_model_impl.h b/components/offline_pages/offline_page_model_impl.h
index b93a227ebf40a5f09029fd8ffdbd3921eae29da0..52558365c1786d31f5d7df1cad2092a2ceda2053 100644
--- a/components/offline_pages/offline_page_model_impl.h
+++ b/components/offline_pages/offline_page_model_impl.h
@@ -48,6 +48,7 @@ struct OfflinePageItem;
 
 class ArchiveManager;
 class ClientPolicyController;
+class DownloadUIAdapter;
 class OfflinePageMetadataStore;
 class OfflinePageStorageManager;
 
@@ -111,6 +112,7 @@ class OfflinePageModelImpl : public OfflinePageModel, public KeyedService {
                    const base::Time& expiration_time,
                    const base::Callback<void(bool)>& callback) override;
   ClientPolicyController* GetPolicyController() override;
+  DownloadUIAdapter* GetDownloadUIAdapter() override;
 
   // Methods for testing only:
   OfflinePageMetadataStore* GetStoreForTesting();
@@ -289,6 +291,9 @@ class OfflinePageModelImpl : public OfflinePageModel, public KeyedService {
   // Controller of the client policies.
   std::unique_ptr<ClientPolicyController> policy_controller_;
 
+  // Adapts offline page related structures to Download UI structures.
+  std::unique_ptr<DownloadUIAdapter> download_ui_adapter_;
+
   // Manager for the storage consumed by archives and responsible for
   // automatic page clearing.
   std::unique_ptr<OfflinePageStorageManager> storage_manager_;