This CL replaces user_manager::UserID with AccountId.

ash/system/user/tray_user_unittest.cc

 // Copyright 2013 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 <vector>
 
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/user/tray_user.h"
 #include "ash/system/user/tray_user_separator.h"
 #include "ash/system/user/user_view.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/test_session_state_delegate.h"
 #include "ash/test/test_shell_delegate.h"
 #include "base/strings/utf_string_conversions.h"
+#include "components/signin/core/account_id/account_id.h"
 #include "components/user_manager/user_info.h"
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/events/test/event_generator.h"
 #include "ui/gfx/animation/animation_container_element.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
 
 class TrayUserTest : public ash::test::AshTestBase {
@@ skipping 235 matching lines @@
 TEST_F(TrayUserTest, MutiUserModeButtonClicks) {
   // Have two users.
   InitializeParameters(2, true);
   ui::test::EventGenerator generator(Shell::GetPrimaryRootWindow());
   ShowTrayMenu(&generator);
 
   // Switch to a new user - which has a capitalized name.
   ClickUserItem(&generator, 1);
   const user_manager::UserInfo* active_user = delegate()->GetActiveUserInfo();
   const user_manager::UserInfo* second_user = delegate()->GetUserInfo(1);
-  EXPECT_EQ(active_user->GetUserID(), second_user->GetUserID());
+  EXPECT_EQ(active_user->GetAccountId(), second_user->GetAccountId());
   // Since the name is capitalized, the email should be different then the
   // user_id.
-  EXPECT_NE(active_user->GetUserID(), second_user->GetEmail());
+  EXPECT_NE(active_user->GetAccountId().GetUserEmail(),
+            second_user->GetEmail());
   tray()->CloseSystemBubble();
 }
 
 #endif
 
 }  // namespace ash