[Offline pages] Extracting and templatizing types for store callbacks

components/offline_pages/offline_page_test_store.cc

Index: components/offline_pages/offline_page_test_store.cc
diff --git a/components/offline_pages/offline_page_test_store.cc b/components/offline_pages/offline_page_test_store.cc
index e6e5637c4d0c9c06830c46e641f0f2cd4a30d98f..70b91c4e0116306876f4ef4a704cb2a076fa1d14 100644
--- a/components/offline_pages/offline_page_test_store.cc
+++ b/components/offline_pages/offline_page_test_store.cc
@@ -56,8 +56,8 @@ void OfflinePageTestStore::UpdateOfflinePages(
     const UpdateCallback& callback) {
   // TODO(fgorski): Cover scenario where new items are being created while they
   // shouldn't.
-  std::unique_ptr<StoreUpdateResult> result(
-      new StoreUpdateResult(StoreState::LOADED));
+  std::unique_ptr<OfflinePagesUpdateResult> result(
+      new OfflinePagesUpdateResult(StoreState::LOADED));
   if (scenario_ == TestScenario::WRITE_FAILED) {
     for (const auto& page : pages) {
       result->item_statuses.push_back(
@@ -81,8 +81,8 @@ void OfflinePageTestStore::UpdateOfflinePages(
 void OfflinePageTestStore::RemoveOfflinePages(
     const std::vector<int64_t>& offline_ids,
     const UpdateCallback& callback) {
-  std::unique_ptr<StoreUpdateResult> result(
-      new StoreUpdateResult(StoreState::LOADED));
+  std::unique_ptr<OfflinePagesUpdateResult> result(
+      new OfflinePagesUpdateResult(StoreState::LOADED));
 
   ASSERT_FALSE(offline_ids.empty());
   if (scenario_ == TestScenario::REMOVE_FAILED) {