Automated IWYU fix for TaskRunner includes.

device/power_save_blocker/power_save_blocker_x11.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 <X11/Xlib.h>
 #include <X11/extensions/dpms.h>
 #include <X11/extensions/scrnsaver.h>
 #include <stdint.h>
 
 #include <memory>
 
 #include "device/power_save_blocker/power_save_blocker.h"
 
 // Xlib #defines Status, but we can't have that for some of our headers.
 #ifdef Status
 #undef Status
 #endif
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
 #include "base/nix/xdg_util.h"
+#include "base/single_thread_task_runner.h"
 #include "base/synchronization/lock.h"
 #include "dbus/bus.h"
 #include "dbus/message.h"
 #include "dbus/object_path.h"
 #include "dbus/object_proxy.h"
 #include "ui/gfx/switches.h"
 #include "ui/gfx/x/x11_types.h"
 
 namespace {
 
@@ skipping 463 matching lines @@
   }
 }
 
 PowerSaveBlocker::~PowerSaveBlocker() {
   delegate_->CleanUp();
   if (freedesktop_suspend_delegate_)
     freedesktop_suspend_delegate_->CleanUp();
 }
 
 }  // namespace device