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

components/offline_pages/core/prefetch/add_unique_urls_task.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 COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_ADD_UNIQUE_URLS_TASK_H_
 #define COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_ADD_UNIQUE_URLS_TASK_H_
 
+#include <string>
 #include <vector>
 
 #include "base/memory/weak_ptr.h"
-#include "components/offline_pages/core/prefetch/prefetch_store.h"
 #include "components/offline_pages/core/prefetch/prefetch_types.h"
 #include "components/offline_pages/core/task.h"
-#include "url/gurl.h"
 
 namespace offline_pages {
 
 // Task that adds new URL suggestions to the pipeline. URLs are matched against
 // existing ones from any stage of the process so that only new, unique ones are
 // actually added.
 // Fully processed items are kept in the store in the PrefetchItemState::ZOMBIE
 // state until it is confirmed that the client for its namespace is not
 // recommending the same URL anymore to avoid processing it twice. So once the
 // step described above is done, all same namespace items in the ZOMBIE state
 // whose URL didn't match any of the just suggested ones are finally deleted
 // from the store.
 class AddUniqueUrlsTask : public Task {
  public:
-  AddUniqueUrlsTask(PrefetchStore* store,
+  AddUniqueUrlsTask(const std::string& name_space,
                     const std::vector<PrefetchURL>& prefetch_urls);
   ~AddUniqueUrlsTask() override;
 
   void Run() override;
 
  private:
-  PrefetchStore* prefetch_store_;
+  void OnUrlsAdded(int added_entry_count);
+
+  const std::string& name_space_;
   std::vector<PrefetchURL> prefetch_urls_;
 
   base::WeakPtrFactory<AddUniqueUrlsTask> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(AddUniqueUrlsTask);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_ADD_UNIQUE_URLS_TASK_H_