Move base to DEPS

base/thread_task_runner_handle.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 BASE_THREAD_TASK_RUNNER_HANDLE_H_
-#define BASE_THREAD_TASK_RUNNER_HANDLE_H_
-
-#include "base/base_export.h"
-#include "base/memory/ref_counted.h"
-
-namespace base {
-
-class SingleThreadTaskRunner;
-
-// ThreadTaskRunnerHandle stores a reference to a thread's TaskRunner
-// in thread-local storage.  Callers can then retrieve the TaskRunner
-// for the current thread by calling ThreadTaskRunnerHandle::Get().
-// At most one TaskRunner may be bound to each thread at a time.
-class BASE_EXPORT ThreadTaskRunnerHandle {
- public:
-  // Gets the SingleThreadTaskRunner for the current thread.
-  static scoped_refptr<SingleThreadTaskRunner> Get();
-
-  // Returns true if the SingleThreadTaskRunner is already created for
-  // the current thread.
-  static bool IsSet();
-
-  // Binds |task_runner| to the current thread. |task_runner| must belong
-  // to the current thread for this to succeed.
-  explicit ThreadTaskRunnerHandle(
-      const scoped_refptr<SingleThreadTaskRunner>& task_runner);
-  ~ThreadTaskRunnerHandle();
-
- private:
-  scoped_refptr<SingleThreadTaskRunner> task_runner_;
-};
-
-}  // namespace base
-
-#endif  // BASE_THREAD_TASK_RUNNER_HANDLE_H_