Cleanup: Remove more unneeded browser_thread.h includes.

chrome/browser/background/background_application_list_model_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.
 
 // TODO(rickcam): Bug 73183: Add unit tests for image loading
 
 #include <cstdlib>
 #include <set>
 
 #include "chrome/browser/background/background_application_list_model.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/stl_util.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_service_unittest.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/permissions_updater.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "chrome/common/extensions/permissions/api_permission.h"
 #include "chrome/common/extensions/permissions/permission_set.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_types.h"
-#include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // This value is used to seed the PRNG at the beginning of a sequence of
 // operations to produce a repeatable sequence.
 #define RANDOM_SEED (0x33F7A7A7)
 
 using extensions::APIPermission;
 using extensions::Extension;
 
 // For ExtensionService interface when it requires a path that is not used.
@@ skipping 332 matching lines @@
         break;
       case 2:
         TogglePermission(service, &extensions, model.get(), &expected, &count);
         break;
       default:
         NOTREACHED();
         break;
     }
   }
 }