[Offline pages] Applying StoreState to track RequestQueueStore state

components/offline_pages/background/request_queue_store_sql.h

Index: components/offline_pages/background/request_queue_store_sql.h
diff --git a/components/offline_pages/background/request_queue_store_sql.h b/components/offline_pages/background/request_queue_store_sql.h
index 80ef7223c2990bd70f7e32fa2def20e9a9f19630..69855f7728e07f03b12c16906a702e09ead2a45f 100644
--- a/components/offline_pages/background/request_queue_store_sql.h
+++ b/components/offline_pages/background/request_queue_store_sql.h
@@ -6,7 +6,6 @@
 #define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_QUEUE_STORE_SQL_H_
 
 #include <stdint.h>
-
 #include <memory>
 #include <vector>
 
@@ -45,6 +44,7 @@ class RequestQueueStoreSQL : public RequestQueueStore {
       const SavePageRequest::RequestState new_state,
       const UpdateMultipleRequestsCallback& callback) override;
   void Reset(const ResetCallback& callback) override;
+  StoreState state() const override;
 
  private:
   // Helper functions to return immediately if no database is found.
@@ -52,10 +52,10 @@ class RequestQueueStoreSQL : public RequestQueueStore {
 
   // Used to initialize DB connection.
   void OpenConnection();
-  void OnOpenConnectionDone(bool success);
+  void OnOpenConnectionDone(StoreState state);
 
   // Used to finalize connection reset.
-  void OnResetDone(const ResetCallback& callback, bool success);
+  void OnResetDone(const ResetCallback& callback, StoreState state);
 
   // Background thread where all SQL access should be run.
   scoped_refptr<base::SequencedTaskRunner> background_task_runner_;
@@ -66,6 +66,9 @@ class RequestQueueStoreSQL : public RequestQueueStore {
   // Database connection.
   std::unique_ptr<sql::Connection> db_;
 
+  // State of the store.
+  StoreState state_;
+
   base::WeakPtrFactory<RequestQueueStoreSQL> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(RequestQueueStoreSQL);
 };