Cleanup: Remove unneeded browser_thread.h includes.

chrome/browser/chromeos/login/wallpaper_manager_unittest.cc

 // Copyright 2013 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 <cstdlib>
 #include <cstring>
 
 #include "ash/ash_resources/grit/ash_resources.h"
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/testing_pref_service.h"
 #include "chrome/browser/chromeos/login/startup_utils.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/login/user_manager_impl.h"
 #include "chrome/browser/chromeos/login/wallpaper_manager.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/settings/cros_settings_names.h"
 #include "chromeos/settings/cros_settings_provider.h"
-#include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/resource/resource_bundle.h"
 
 using namespace ash;
 
 const char kTestUser1[] = "test-user@example.com";
 const char kTestUser1Hash[] = "test-user@example.com-hash";
 
 namespace chromeos {
 
@@ skipping 88 matching lines @@
   WallpaperManager::Get()->InitializeWallpaper();
   EXPECT_TRUE(test_api->current_wallpaper_path().empty());
   UserManager::Get()->UserLoggedIn(UserManager::kGuestUserName,
                                    UserManager::kGuestUserName, false);
   WaitAsyncWallpaperLoad();
   EXPECT_FALSE(ash::Shell::GetInstance()->desktop_background_controller()->
       SetDefaultWallpaper(true));
 }
 
 }  // namespace chromeos