Add a DistilledContentStore (and an in-memory impl)

components/dom_distiller/core/dom_distiller_service.h

 // Copyright 2013 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_DOM_DISTILLER_CORE_DOM_DISTILLER_SERVICE_H_
 #define COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_SERVICE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "components/dom_distiller/core/article_entry.h"
 
 class GURL;
 
 namespace syncer {
 class SyncableService;
 }
 
 namespace dom_distiller {
 
 class DistilledArticleProto;
+class DistilledContentStore;
 class DistillerFactory;
 class DomDistillerObserver;
 class DomDistillerStoreInterface;
 class TaskTracker;
 class ViewerHandle;
 class ViewRequestDelegate;
 
 // Service for interacting with the Dom Distiller.
 // Construction, destruction, and usage of this service must happen on the same
 // thread. Callbacks will be called on that same thread.
@@ skipping 72 matching lines @@
 
   TaskTracker* GetTaskTrackerForEntry(const ArticleEntry& entry) const;
 
   // Gets the task tracker for the given |url| or |entry|. If no appropriate
   // tracker exists, this will create one, initialize it, and add it to
   // |tasks_|.
   TaskTracker* GetOrCreateTaskTrackerForUrl(const GURL& url);
   TaskTracker* GetOrCreateTaskTrackerForEntry(const ArticleEntry& entry);
 
   scoped_ptr<DomDistillerStoreInterface> store_;
+  scoped_ptr<DistilledContentStore> content_store_;
   scoped_ptr<DistillerFactory> distiller_factory_;
 
   typedef ScopedVector<TaskTracker> TaskList;
   TaskList tasks_;
 
   DISALLOW_COPY_AND_ASSIGN(DomDistillerService);
 };
 
 }  // namespace dom_distiller
 
 #endif  // COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_SERVICE_H_