patch from issue 473153002

components/signin/core/browser/account_tracker_service_unittest.cc

Index: components/signin/core/browser/account_tracker_service_unittest.cc
diff --git a/components/signin/core/browser/account_tracker_service_unittest.cc b/components/signin/core/browser/account_tracker_service_unittest.cc
index f376d964781c0d976b81775120bf6973bf83eb9d..5cfd917f714ff1d6e9e8cb73f44bf7457dcb4572 100644
--- a/components/signin/core/browser/account_tracker_service_unittest.cc
+++ b/components/signin/core/browser/account_tracker_service_unittest.cc
@@ -507,3 +507,19 @@ TEST_F(AccountTrackerServiceTest, Persistence) {
     tracker.Shutdown();
   }
 }
+
+TEST_F(AccountTrackerServiceTest, SeedAccountInfo) {
+  std::vector<AccountTrackerService::AccountInfo> infos =
+      account_tracker()->GetAccounts();
+  EXPECT_EQ(0u, infos.size());
+
+  account_tracker()->SeedAccountInfo("alpha",
+                                     AccountIdToGaiaId("alpha"),
+                                     AccountIdToEmail("alpha"));
+
+  infos = account_tracker()->GetAccounts();
+  EXPECT_EQ(1u, infos.size());
+  EXPECT_EQ("alpha", infos[0].account_id);
+  EXPECT_EQ(AccountIdToGaiaId("alpha"), infos[0].gaia);
+  EXPECT_EQ(AccountIdToEmail("alpha"), infos[0].email);
+}