#include "chrome/browser/extensions/activity_log/activity_log_task_runner.h"
#include "base/task/lazy_thread_pool_task_runner.h"
#include "base/task/single_thread_task_runner.h"
#include "base/task/single_thread_task_runner_thread_mode.h"
namespace extensions {
namespace {
base::SingleThreadTaskRunner* g_task_runner_for_testing = …;
base::LazyThreadPoolSingleThreadTaskRunner g_task_runner = …;
}
const scoped_refptr<base::SingleThreadTaskRunner> GetActivityLogTaskRunner() { … }
void SetActivityLogTaskRunnerForTesting(
base::SingleThreadTaskRunner* task_runner) { … }
}