Attaches OfflineContentAggregator to Profile

chrome/browser/offline_items_collection/offline_content_aggregator_factory.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 CHROME_BROWSER_OFFLINE_ITEMS_COLLECTION_OFFLINE_CONTENT_AGGREGATOR_FACTORY_H_
+#define CHROME_BROWSER_OFFLINE_ITEMS_COLLECTION_OFFLINE_CONTENT_AGGREGATOR_FACTORY_H_
+
+#include "base/macros.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+
+namespace base {
+template <typename T>
+struct DefaultSingletonTraits;
+}  // namespace base
+
+namespace content {
+class BrowserContext;
+}  // namespace content
+
+namespace offline_items_collection {
+class OfflineContentAggregator;
+
+// This class is the main access point for an OfflineContentAggregator.  It is
+// responsible for building the OfflineContentAggregator and associating it with
+// a particular content::BrowserContext.
+class OfflineContentAggregatorFactory
+    : public BrowserContextKeyedServiceFactory {
+ public:
+  // Returns a singleton instance of an OfflineContentAggregatorFactory.
+  static OfflineContentAggregatorFactory* GetInstance();
+
+  // Returns the OfflineContentAggregator associated with |context| or creates
+  // and associates one if it doesn't exist.
+  static offline_items_collection::OfflineContentAggregator*
+  GetForBrowserContext(content::BrowserContext* context);
+
+ private:
+  friend struct base::DefaultSingletonTraits<OfflineContentAggregatorFactory>;
+
+  OfflineContentAggregatorFactory();
+  ~OfflineContentAggregatorFactory() override;
+
+  // BrowserContextKeyedServiceFactory implementation.
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* context) const override;
+  content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(OfflineContentAggregatorFactory);
+};
+
+}  // namespace offline_items_collection
+
+#endif  // CHROME_BROWSER_OFFLINE_ITEMS_COLLECTION_OFFLINE_CONTENT_AGGREGATOR_FACTORY_H_