ChromeOS: Fix removeUser button on signin screen.

chrome/browser/chromeos/login/signin/device_id_browsertest.cc

 // Copyright 2015 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 "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
@@ skipping 111 matching lines @@
     WaitForSessionStart();
   }
 
   void RemoveUser(const AccountId& account_id) {
     user_manager::UserManager::Get()->RemoveUser(account_id, this);
     user_removal_loop_.Run();
   }
 
  private:
   // user_manager::RemoveUserDelegate:
-  void OnBeforeUserRemoved(const std::string& username) override {}
+  void OnBeforeUserRemoved(const AccountId& account_id) override {}
 
-  void OnUserRemoved(const std::string& username) override {
+  void OnUserRemoved(const AccountId& account_id) override {
     user_removal_loop_.Quit();
   }
 
   base::FilePath GetRefreshTokenToDeviceIdMapFilePath() const {
     return base::CommandLine::ForCurrentProcess()
         ->GetSwitchValuePath(::switches::kUserDataDir)
         .Append(kRefreshTokenToDeviceIdMapFile);
   }
 
   void LoadRefreshTokenToDeviceIdMap() {
@@ skipping 143 matching lines @@
 IN_PROC_BROWSER_TEST_F(DeviceIDTest, LegacyUsers) {
   EXPECT_TRUE(GetDeviceId(AccountId::FromUserEmail(kFakeUserEmail)).empty());
   SignInOffline(kFakeUserEmail, kFakeUserPassword);
   // Last param |auth_code| is empty, because we don't pass a device ID to GAIA
   // in this case.
   CheckDeviceIDIsConsistent(AccountId::FromUserEmail(kFakeUserEmail),
                             std::string());
 }
 
 }  // namespace chromeos