[Offline Pages] Implement OfflinePageStorageManager.

components/offline_pages/offline_page_model.h

 // Copyright 2015 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_OFFLINE_PAGE_MODEL_H_
 #define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 22 matching lines @@
 class TimeDelta;
 }
 
 namespace offline_pages {
 
 static const char* const kBookmarkNamespace = "bookmark";
 static const int64_t kInvalidOfflineId = 0;
 
 struct ClientId;
 
+class ClientPolicyController;
 struct OfflinePageItem;
 class OfflinePageMetadataStore;
+class OfflinePageStorageManager;
 
 // Service for saving pages offline, storing the offline copy and metadata, and
 // retrieving them upon request.
 //
 // Example usage:
 //   class ArchiverImpl : public OfflinePageArchiver {
 //     // This is a class that knows how to create archiver
 //     void CreateArchiver(...) override;
 //     ...
 //   }
@@ skipping 195 matching lines @@
   // pages. Method is to be called after a page was saved or some pages are
   // deleted. In the latter case |reporting_after_delete| is set to true.
   // Caller is supposed to provide the current |total_space_bytes| on drive
   // where the pages are stored, as well as |free_space_bytes| after the
   // operation was taken. The method will report total size of all pages, and
   // percentage of size of pages as compared to total space and free space.
   void RecordStorageHistograms(int64_t total_space_bytes,
                                int64_t free_space_bytes,
                                bool reporting_after_delete);
 
+  // Returns the policy controller.
+  ClientPolicyController* GetPolicyController();
+
   // Methods for testing only:
   OfflinePageMetadataStore* GetStoreForTesting();
 
+  OfflinePageStorageManager* GetStorageManager();
+
   bool is_loaded() const { return is_loaded_; }
 
  private:
   FRIEND_TEST_ALL_PREFIXES(OfflinePageModelTest, MarkPageForDeletion);
 
   typedef ScopedVector<OfflinePageArchiver> PendingArchivers;
 
   // Callback for ensuring archive directory is created.
   void OnEnsureArchivesDirCreatedDone();
 
@@ skipping 101 matching lines @@
   std::map<int64_t, OfflinePageItem> offline_pages_;
 
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
 
   // Pending archivers owned by this model.
   PendingArchivers pending_archivers_;
 
   // Delayed tasks that should be invoked after the loading is done.
   std::vector<base::Closure> delayed_tasks_;
 
+  // Controller of the client policies.
+  std::unique_ptr<ClientPolicyController> policy_controller_;
+
+  // Storage manager of this model.

[fgorski, 2016/05/05 04:53:08]

I believe we will run into a problem of distinguishing between metadata storage
and storage manager.

Could you try to add a sentence of this being used to manage the storage
consumed by archives.

[romax, 2016/05/05 21:00:02]

Done.

+  std::unique_ptr<OfflinePageStorageManager> storage_manager_;
+
   base::WeakPtrFactory<OfflinePageModel> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflinePageModel);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_H_