Clean up LoginUIService. Remove Singleton behavior from PeopleHandler

chrome/browser/sync/sync_error_notifier_ash_unittest.cc

 // Copyright 2014 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/sync/sync_error_notifier_ash.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 54 matching lines @@
  public:
   FakeLoginUI() : focus_ui_call_count_(0) {}
 
   ~FakeLoginUI() override {}
 
   int focus_ui_call_count() const { return focus_ui_call_count_; }
 
  private:
   // LoginUIService::LoginUI:
   void FocusUI() override { ++focus_ui_call_count_; }
-  void CloseUI() override {}
 
   int focus_ui_call_count_;
 };
 
 std::unique_ptr<KeyedService> BuildMockLoginUIService(
     content::BrowserContext* profile) {
   return base::WrapUnique(new FakeLoginUIService());
 }
 
 class SyncErrorNotifierTest : public AshTestBase  {
@@ skipping 146 matching lines @@
     SCOPED_TRACE("Not expecting notification since sync setup is incomplete");
     VerifySyncErrorNotifierResult(
         GoogleServiceAuthError::INVALID_GAIA_CREDENTIALS,
         false /* not signed in */,
         false /* no error */);
   }
 }
 
 }  // namespace test
 }  // namespace ash