Automated IWYU fix for TaskRunner includes.

components/password_manager/core/browser/password_store_default.h

 // Copyright 2014 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 COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_STORE_DEFAULT_H_
 #define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_STORE_DEFAULT_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
+#include "base/single_thread_task_runner.h"
 #include "components/password_manager/core/browser/login_database.h"
 #include "components/password_manager/core/browser/password_store.h"
 
 class PrefService;
 
 namespace password_manager {
 
 // Simple password store implementation that delegates everything to
 // the LoginDatabase.
 class PasswordStoreDefault : public PasswordStore {
@@ skipping 73 matching lines @@
   // called on the DB thread in a deferred manner. If opening the DB fails,
   // |login_db_| will be reset and stay NULL for the lifetime of |this|.
   std::unique_ptr<LoginDatabase> login_db_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordStoreDefault);
 };
 
 }  // namespace password_manager
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_STORE_DEFAULT_H_