Remove useless includes to ash_util.h

chrome/browser/signin/signin_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/signin/signin_error_notifier_ash.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 11 matching lines @@
 #include "chrome/test/base/testing_profile.h"
 #include "chrome/test/base/testing_profile_manager.h"
 #include "components/signin/core/browser/fake_auth_status_provider.h"
 #include "components/signin/core/browser/signin_error_controller.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/message_center/notification.h"
 
 #if defined(OS_WIN)
-#include "chrome/browser/ui/ash/ash_util.h"
 #include "ui/aura/test/test_screen.h"
 #include "ui/display/screen.h"
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/login/users/mock_user_manager.h"
 #include "chrome/browser/chromeos/login/users/scoped_user_manager_enabler.h"
 #endif
 
 namespace ash {
 namespace test {
 
 namespace {
 
 static const char kTestAccountId[] = "testuser@test.com";
 
 // Notification ID corresponding to kProfileSigninNotificationId +
 // kTestAccountId.
-static const std::string kNotificationId =
+static const char kNotificationId[] =
     "chrome://settings/signin/testuser@test.com";
 }
 
 class SigninErrorNotifierTest : public AshTestBase {
  public:
   void SetUp() override {
     // Create a signed-in profile.
     TestingProfile::Builder builder;
     builder.AddTestingFactory(SigninManagerFactory::GetInstance(),
                               BuildFakeSigninManagerBase);
@@ skipping 187 matching lines @@
       EXPECT_FALSE(notification->title().empty());
       EXPECT_FALSE(notification->message().empty());
       EXPECT_EQ((size_t)1, notification->buttons().size());
     }
   }
 }
 #endif
 
 }  // namespace test
 }  // namespace ash