Move WorkerTaskRunner to content/child.

webkit/child/worker_task_runner.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 WEBKIT_CHILD_WORKER_TASK_RUNNER_H_
-#define WEBKIT_CHILD_WORKER_TASK_RUNNER_H_
-
-#include <map>
-
-#include "base/atomic_sequence_num.h"
-#include "base/callback_forward.h"
-#include "base/synchronization/lock.h"
-#include "base/threading/thread_local.h"
-#include "third_party/WebKit/public/platform/WebWorkerRunLoop.h"
-#include "webkit/child/webkit_child_export.h"
-
-namespace webkit_glue {
-
-class WEBKIT_CHILD_EXPORT WorkerTaskRunner {
- public:
-  WorkerTaskRunner();
-
-  bool PostTask(int id, const base::Closure& task);
-  int PostTaskToAllThreads(const base::Closure& task);
-  int CurrentWorkerId();
-  static WorkerTaskRunner* Instance();
-
-  class WEBKIT_CHILD_EXPORT Observer {
-   public:
-    virtual ~Observer() {}
-    virtual void OnWorkerRunLoopStopped() = 0;
-  };
-  // Add/Remove an observer that will get notified when the current worker run
-  // loop is stopping. This observer will not get notified when other threads
-  // are stopping.  It's only valid to call these on a worker thread.
-  void AddStopObserver(Observer* observer);
-  void RemoveStopObserver(Observer* observer);
-
-  void OnWorkerRunLoopStarted(const blink::WebWorkerRunLoop& loop);
-  void OnWorkerRunLoopStopped(const blink::WebWorkerRunLoop& loop);
-
- private:
-  friend class WorkerTaskRunnerTest;
-
-  typedef std::map<int, blink::WebWorkerRunLoop> IDToLoopMap;
-
-  ~WorkerTaskRunner();
-
-  struct ThreadLocalState;
-  base::ThreadLocalPointer<ThreadLocalState> current_tls_;
-
-  base::AtomicSequenceNumber id_sequence_;
-  IDToLoopMap loop_map_;
-  base::Lock loop_map_lock_;
-};
-
-}  // namespace webkit_glue
-
-#endif // WEBKIT_CHILD_WORKER_TASK_RUNNER_H_