Connect BackgroundFetch to the OfflineItemCollection

chrome/browser/background_fetch/background_fetch_client_factory.h

Index: chrome/browser/background_fetch/background_fetch_client_factory.h
diff --git a/chrome/browser/background_fetch/background_fetch_client_factory.h b/chrome/browser/background_fetch/background_fetch_client_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..34e11a44a785a54fa7bf66af0880635a83092255
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+++ b/chrome/browser/background_fetch/background_fetch_client_factory.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_FACTORY_H_
+#define CHROME_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_CLIENT_FACTORY_H_
+
+#include "base/macros.h"
+#include "base/memory/singleton.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+
+class BackgroundFetchClientImpl;
+class Profile;
+
+class BackgroundFetchClientFactory : public BrowserContextKeyedServiceFactory {
+ public:
+  static BackgroundFetchClientImpl* GetForProfile(Profile* profile);
+  static BackgroundFetchClientFactory* GetInstance();
+
+ private:
+  friend struct base::DefaultSingletonTraits<BackgroundFetchClientFactory>;
+
+  BackgroundFetchClientFactory();
+  ~BackgroundFetchClientFactory() override;
+
+  // BrowserContextKeyedBaseFactory methods:
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* context) const override;
+  content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(BackgroundFetchClientFactory);
+};
+
+#endif  // CHROME_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_CLIENT_FACTORY_H_