Connect BackgroundFetch to the OfflineItemCollection

chrome/browser/background_fetch/background_fetch_client_impl.h

Index: chrome/browser/background_fetch/background_fetch_client_impl.h
diff --git a/chrome/browser/background_fetch/background_fetch_client_impl.h b/chrome/browser/background_fetch/background_fetch_client_impl.h
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+++ b/chrome/browser/background_fetch/background_fetch_client_impl.h
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+// 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.
+
+#ifndef CHROME_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_CLIENT_IMPL_H_
+#define CHROME_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_CLIENT_IMPL_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "components/keyed_service/core/keyed_service.h"
+#include "components/offline_items_collection/core/offline_content_provider.h"
+#include "content/public/browser/background_fetch_client.h"
+
+namespace offline_items_collection {
+struct ContentId;
+struct OfflineItem;
+}  // namespace offline_items_collection
+
+class Profile;
+
+class BackgroundFetchClientImpl
+    : public content::BackgroundFetchClient,
+      public offline_items_collection::OfflineContentProvider,
+      public KeyedService {
+ public:
+  explicit BackgroundFetchClientImpl(Profile* profile);
+  ~BackgroundFetchClientImpl() override;
+
+  // KeyedService override.
+  void Shutdown() override;
+
+  // content::BackgroundFetchClient implementation.
+  void SetDelegate(Delegate* delegate) override;
+
+  // components::offline_items_collection::OfflineContentProvider overrides.
+  bool AreItemsAvailable() override;
+  void OpenItem(const offline_items_collection::ContentId& content_id) override;
+  void RemoveItem(
+      const offline_items_collection::ContentId& content_id) override;
+  void CancelDownload(
+      const offline_items_collection::ContentId& content_id) override;
+  void PauseDownload(
+      const offline_items_collection::ContentId& content_id) override;
+  void ResumeDownload(
+      const offline_items_collection::ContentId& content_id) override;
+  const offline_items_collection::OfflineItem* GetItemById(
+      const offline_items_collection::ContentId& content_id) override;
+  offline_items_collection::OfflineContentProvider::OfflineItemList
+  GetAllItems() override;
+  void GetVisualsForItem(const offline_items_collection::ContentId& id,
+                         const VisualsCallback& callback) override;
+  void AddObserver(Observer* observer) override;
+  void RemoveObserver(Observer* observer) override;
+
+ private:
+  // This object is owned by the Profile.
+  Profile* profile_;
+
+  // The |delegate| is owned externally and will remove itself prior to
+  // deletion.
+  Delegate* delegate_;
+
+  // The name of the namespace registered with the aggregator.
+  std::string namespace_;
+
+  DISALLOW_COPY_AND_ASSIGN(BackgroundFetchClientImpl);
+};
+
+#endif  // CHROME_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_CLIENT_IMPL_H_