Prefetching: Introduce store commands abstractions to be used by tasks.

components/offline_pages/core/prefetch/store/prefetch_store_command_factory.h

Index: components/offline_pages/core/prefetch/store/prefetch_store_command_factory.h
diff --git a/components/offline_pages/core/prefetch/store/prefetch_store_command_factory.h b/components/offline_pages/core/prefetch/store/prefetch_store_command_factory.h
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index 0000000000000000000000000000000000000000..bd83d4e37c26f5c6ce21598402d81172348fbdcb
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+++ b/components/offline_pages/core/prefetch/store/prefetch_store_command_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 COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_PREFETCH_STORE_COMMAND_FACTORY_H_
+#define COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_PREFETCH_STORE_COMMAND_FACTORY_H_
+
+#include <memory>
+#include <vector>
+
+#include "base/callback.h"
+#include "components/offline_pages/core/prefetch/store/add_urls_store_command.h"
+#include "components/offline_pages/core/prefetch/store/cleanup_zombies_store_command.h"
+
+namespace offline_pages {
+
+// The abstract factory for prefetching store commands. This API is used by the
+// dispatcher to provided needed commands to each prefetching pipeline task it
+// creates.
+class PrefetchStoreCommandFactory {
+ public:
+  virtual std::unique_ptr<AddUrlsStoreCommand> createAddUrls() = 0;
+
+  virtual std::unique_ptr<CleanupZombiesStoreCommand>
+  createCleanupZombies() = 0;
+};
+
+}  // namespace offline_pages
+
+#endif  // COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_PREFETCH_STORE_COMMAND_FACTORY_H_