Revert of This CL replaces user_manager::UserID with AccountId.

chrome/browser/chromeos/printer_detector/printer_detector_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 "chrome/browser/chromeos/printer_detector/printer_detector.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 85 matching lines @@
  protected:
   void SetExtensionSystemReady(TestingProfile* profile) {
     extensions::TestExtensionSystem* test_extension_system =
         static_cast<extensions::TestExtensionSystem*>(
             extensions::ExtensionSystem::Get(profile));
     test_extension_system->SetReady();
     base::RunLoop().RunUntilIdle();
   }
 
   void AddTestUser() {
-    const user_manager::User* user =
-        user_manager_->AddUser(AccountId::FromUserEmail(kTestUserId));
+    const user_manager::User* user = user_manager_->AddUser(kTestUserId);
     profile_->set_profile_name(kTestUserId);
     chromeos::ProfileHelper::Get()->SetUserToProfileMappingForTesting(
         user, profile_.get());
     chromeos::PrinterDetectorFactory::GetInstance()
         ->Get(profile_.get())
         ->SetNotificationUIManagerForTesting(&notification_ui_manager_);
   }
 
   void InvokeUsbAdded(uint16 vendor_id,
                       uint16 product_id,
@@ skipping 212 matching lines @@
                       .Set("interfaceClass", kPrinterInterfaceClass)))).Pass();
   ASSERT_TRUE(extensions::ExtensionRegistry::Get(profile_.get())
                   ->AddEnabled(extension));
 
   InvokeUsbAdded(123, 456, 1);
 
   ASSERT_EQ(0u, notification_ui_manager_.GetNotificationCount());
 }
 
 }  // namespace chromeos