[Offline pages] Applying StoreState to track RequestQueueStore state

components/offline_pages/background/request_queue_in_memory_store.cc

Index: components/offline_pages/background/request_queue_in_memory_store.cc
diff --git a/components/offline_pages/background/request_queue_in_memory_store.cc b/components/offline_pages/background/request_queue_in_memory_store.cc
index 1eb2cab972fb54d8746d3e7ece89bc789fb851f5..f4114080a3c559cccaae9e976fe0738b8280dc7f 100644
--- a/components/offline_pages/background/request_queue_in_memory_store.cc
+++ b/components/offline_pages/background/request_queue_in_memory_store.cc
@@ -47,7 +47,7 @@ void RequestQueueInMemoryStore::UpdateRequests(
     const std::vector<SavePageRequest>& requests,
     const UpdateCallback& callback) {
   std::unique_ptr<UpdateRequestsResult> result(
-      new UpdateRequestsResult(StoreState::LOADED));
+      new UpdateRequestsResult(state()));
 
   ItemActionStatus status;
   for (const auto& request : requests) {
@@ -131,4 +131,8 @@ void RequestQueueInMemoryStore::Reset(const ResetCallback& callback) {
                                                 base::Bind(callback, true));
 }
 
+StoreState RequestQueueInMemoryStore::state() const {
+  return StoreState::LOADED;
+}
+
 }  // namespace offline_pages