Automated IWYU fix for TaskRunner includes.

chrome/browser/extensions/api/messaging/native_message_process_host.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_MESSAGE_PROCESS_HOST_H_
 #define CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_MESSAGE_PROCESS_HOST_H_
 
 #include <memory>
 #include <queue>
 #include <string>
 
 #include "base/files/file.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process/process.h"
+#include "base/single_thread_task_runner.h"
 #include "build/build_config.h"
 #include "chrome/browser/extensions/api/messaging/native_process_launcher.h"
 #include "extensions/browser/api/messaging/native_message_host.h"
 #include "ui/gfx/native_widget_types.h"
 
 #if defined(OS_POSIX)
 #include "base/files/file_descriptor_watcher_posix.h"
 #endif
 
 namespace net {
@@ skipping 112 matching lines @@
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   base::WeakPtrFactory<NativeMessageProcessHost> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeMessageProcessHost);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_MESSAGE_PROCESS_HOST_H_