Automated IWYU fix for TaskRunner includes.

components/os_crypt/os_crypt_linux.cc

 // Copyright 2016 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 "components/os_crypt/os_crypt.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <iterator>
 #include <memory>
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/lock.h"
 #include "components/os_crypt/key_storage_linux.h"
 #include "crypto/encryptor.h"
 #include "crypto/symmetric_key.h"
 
 namespace {
 
 // Salt for Symmetric key derivation.
@@ skipping 255 matching lines @@
     // |KeyStorage| instance can be created. Enable V11 by returning the mock.
     if (get_key_storage_mock)
       g_key_storage_provider = get_key_storage_mock;
   } else {
     // Restore real implementation
     std::copy(std::begin(get_password_save), std::end(get_password_save),
               std::begin(g_get_password));
     g_key_storage_provider = &GetKeyStorage;
   }
 }