Prefer to use the AccountID to the Email from ListAccounts.

chrome/browser/signin/signin_manager_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/signin/core/browser/signin_manager.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 426 matching lines @@
             profile()->GetPrefs()->GetString(prefs::kGoogleServicesUsername));
 
   // Make sure account tracker was updated.
   AccountTrackerService* service =
       AccountTrackerServiceFactory::GetForProfile(profile());
   AccountTrackerService::AccountInfo info = service->GetAccountInfo(
       manager_->GetAuthenticatedAccountId());
   EXPECT_EQ("user@gmail.com", info.email);
   EXPECT_EQ("account_id", info.gaia);
 }
+
+TEST_F(SigninManagerTest, CanonicalizesPrefs) {
+  profile()->GetPrefs()->SetString(prefs::kGoogleServicesUsername,
+                                   "user.C@gmail.com");
+  CreateNakedSigninManager();
+  manager_->Initialize(g_browser_process->local_state());
+  EXPECT_EQ("user.C@gmail.com", manager_->GetAuthenticatedUsername());
+
+  // TODO(rogerta): until the migration to gaia id, the account id will remain
+  // the old username.
+  EXPECT_EQ("userc@gmail.com", manager_->GetAuthenticatedAccountId());
+  EXPECT_EQ("userc@gmail.com",
+            profile()->GetPrefs()->GetString(prefs::kGoogleServicesAccountId));
+  EXPECT_EQ("",
+            profile()->GetPrefs()->GetString(prefs::kGoogleServicesUsername));
+
+  // Make sure account tracker has a canonicalized username.
+  AccountTrackerService* service =
+      AccountTrackerServiceFactory::GetForProfile(profile());
+  AccountTrackerService::AccountInfo info = service->GetAccountInfo(
+      manager_->GetAuthenticatedAccountId());
+  EXPECT_EQ("user.C@gmail.com", info.email);
+  EXPECT_EQ("userc@gmail.com", info.account_id);
+}