Add a DistilledContentStore (and an in-memory impl)

components/dom_distiller/core/dom_distiller_service.h

Index: components/dom_distiller/core/dom_distiller_service.h
diff --git a/components/dom_distiller/core/dom_distiller_service.h b/components/dom_distiller/core/dom_distiller_service.h
index 8f4ea70f7bed5f4a69d685deb205e92a9977e02e..dcaac91f6280d0348017b335b1a5e34f2a334937 100644
--- a/components/dom_distiller/core/dom_distiller_service.h
+++ b/components/dom_distiller/core/dom_distiller_service.h
@@ -23,6 +23,7 @@ class SyncableService;
 namespace dom_distiller {
 
 class DistilledArticleProto;
+class DistilledContentStore;
 class DistillerFactory;
 class DomDistillerObserver;
 class DomDistillerStoreInterface;
@@ -103,6 +104,9 @@ class DomDistillerService : public DomDistillerServiceInterface {
   void AddDistilledPageToList(const ArticleEntry& entry,
                               const DistilledArticleProto* article_proto,
                               bool distillation_succeeded);
+  void AddDistilledContentToStore(const ArticleEntry& entry,
+                                  const DistilledArticleProto* article_proto,
+                                  bool distillation_succeeded);
 
   TaskTracker* CreateTaskTracker(const ArticleEntry& entry);
 
@@ -115,6 +119,7 @@ class DomDistillerService : public DomDistillerServiceInterface {
   TaskTracker* GetOrCreateTaskTrackerForEntry(const ArticleEntry& entry);
 
   scoped_ptr<DomDistillerStoreInterface> store_;
+  scoped_ptr<DistilledContentStore> content_store_;
   scoped_ptr<DistillerFactory> distiller_factory_;
 
   typedef ScopedVector<TaskTracker> TaskList;