[Offline Pages] Fix cases where returning NOT_FOUND when deleting.

components/offline_pages/offline_page_model_impl_unittest.cc

Index: components/offline_pages/offline_page_model_impl_unittest.cc
diff --git a/components/offline_pages/offline_page_model_impl_unittest.cc b/components/offline_pages/offline_page_model_impl_unittest.cc
index 184858c9bb7941ad440b7ce31b0edcc36bdbdb5d..cb0ee364f6a5416e3d3d9ddf46dbd0aec76feb60 100644
--- a/components/offline_pages/offline_page_model_impl_unittest.cc
+++ b/components/offline_pages/offline_page_model_impl_unittest.cc
@@ -687,14 +687,14 @@ TEST_F(OfflinePageModelImplTest, DeletePageByPredicate) {
 TEST_F(OfflinePageModelImplTest, DeletePageNotFound) {
   DeletePage(1234LL, base::Bind(&OfflinePageModelImplTest::OnDeletePageDone,
                                 AsWeakPtr()));
-  EXPECT_EQ(DeletePageResult::NOT_FOUND, last_delete_result());
+  EXPECT_EQ(DeletePageResult::SUCCESS, last_delete_result());
 
   ResetResults();
 
   model()->DeletePagesByURLPredicate(
       base::Bind(&URLSpecContains, "page.com"),
       base::Bind(&OfflinePageModelImplTest::OnDeletePageDone, AsWeakPtr()));
-  EXPECT_EQ(DeletePageResult::NOT_FOUND, last_delete_result());
+  EXPECT_EQ(DeletePageResult::SUCCESS, last_delete_result());
 }
 
 TEST_F(OfflinePageModelImplTest, DeletePageStoreFailureOnRemove) {