Connect BackgroundFetch to the OfflineItemCollection

content/public/browser/background_fetch_delegate.h

+// 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 CONTENT_PUBLIC_BROWSER_BACKGROUND_FETCH_DELEGATE_H_
+#define CONTENT_PUBLIC_BROWSER_BACKGROUND_FETCH_DELEGATE_H_
+
+#include <string>
+
+#include "content/common/content_export.h"
+
+namespace content {
+
+// Class for access to the BackgroundFetch system. Manages in progress fetches
+// and supports pause, resume, cancel, and UI update.
+class CONTENT_EXPORT BackgroundFetchDelegate {

[Peter Beverloo, 2017/03/29 14:32:13]

nit: could we define this inline in the BackgroundFetchClient as
BackgroundFetchClient::Delegate? It seems trivial enough, and the functionality
is closely related.

[harkness, 2017/03/30 12:42:36]

Done.

+ public:
+  // Cancel all fetches associated with the |registration_id|.
+  virtual void CancelDownload(const std::string& registration_id) = 0;
+
+  // Pause all fetches associated with the |registration_id|.
+  virtual void PauseDownload(const std::string& registration_id) = 0;
+
+  // Resume any fetches associated with the |registration_id|.
+  virtual void ResumeDownload(const std::string& registration_id) = 0;
+
+ protected:
+  virtual ~BackgroundFetchDelegate() {}
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_BACKGROUND_FETCH_DELEGATE_H_