Cleanup: Remove more unneeded browser_thread.h includes.

chrome/browser/chromeos/system/tray_accessibility_browsertest.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 "ash/magnifier/magnification_controller.h"
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/tray_views.h"
 #include "ash/system/tray_accessibility.h"
 #include "ash/system/user/login_status.h"
 #include "base/command_line.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_util.h"
 #include "chrome/browser/chromeos/accessibility/magnification_manager.h"
 #include "chrome/browser/chromeos/cros/cros_in_process_browser_test.h"
 #include "chrome/browser/chromeos/login/helper.h"
 #include "chrome/browser/chromeos/login/login_utils.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/login/user_manager_impl.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_profile.h"
-#include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/views/widget/widget.h"
 
 namespace chromeos {
 
 namespace {
   ui::MouseEvent& dummyEvent = *((ui::MouseEvent*)0);
 }
 
@@ skipping 408 matching lines @@
   accessibility::EnableSpokenFeedback(false, NULL, ash::A11Y_NOTIFICATION_NONE);
   accessibility::EnableHighContrast(false);
   MagnificationManager::Get()->SetMagnifier(ash::MAGNIFIER_OFF);
   EXPECT_TRUE(CreateDetailedMenu());
   EXPECT_FALSE(IsSpokenFeedbackEnabledOnDetailMenu());
   EXPECT_FALSE(IsHighContrastEnabledOnDetailMenu());
   EXPECT_FALSE(IsScreenMagnifierEnabledOnDetailMenu());
   CloseDetailMenu();
 }
 
-}
+}  // namespace chromeos