Convert windows TaskQueue implementation to pimpl convention.

webrtc/rtc_base/task_queue.h

 /*
  *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_RTC_BASE_TASK_QUEUE_H_
 #define WEBRTC_RTC_BASE_TASK_QUEUE_H_
 
 #include <list>
 #include <memory>
 #include <queue>
 #include <type_traits>
 
 #if defined(WEBRTC_MAC)
 #include <dispatch/dispatch.h>
 #endif
 
 #include "webrtc/rtc_base/constructormagic.h"
 #include "webrtc/rtc_base/criticalsection.h"
 #include "webrtc/rtc_base/scoped_ref_ptr.h"
 
-#if defined(WEBRTC_WIN)
-#include "webrtc/rtc_base/platform_thread.h"
-#endif
-
 namespace rtc {
 
 // Base interface for asynchronously executed tasks.
 // The interface basically consists of a single function, Run(), that executes
 // on the target queue.  For more details see the Run() method and TaskQueue.
 class QueuedTask {
  public:
   QueuedTask() {}
   virtual ~QueuedTask() {}
 
@@ skipping 198 matching lines @@
         std::unique_ptr<QueuedTask>(new ClosureTask<Closure2>(reply)));
   }
 
  private:
 #if defined(WEBRTC_MAC)
   struct QueueContext;
   struct TaskContext;
   struct PostTaskAndReplyContext;
   dispatch_queue_t queue_;
   QueueContext* const context_;
-#elif defined(WEBRTC_WIN)
-  class ThreadState;
-  void RunPendingTasks();
-  static void ThreadMain(void* context);
-
-  class WorkerThread : public PlatformThread {
-   public:
-    WorkerThread(ThreadRunFunction func,
-                 void* obj,
-                 const char* thread_name,
-                 ThreadPriority priority)
-        : PlatformThread(func, obj, thread_name, priority) {}
-
-    bool QueueAPC(PAPCFUNC apc_function, ULONG_PTR data) {
-      return PlatformThread::QueueAPC(apc_function, data);
-    }
-  };
-  WorkerThread thread_;
-  rtc::CriticalSection pending_lock_;
-  std::queue<std::unique_ptr<QueuedTask>> pending_ GUARDED_BY(pending_lock_);
-  HANDLE in_queue_;
 #else
   class Impl;
   const scoped_refptr<Impl> impl_;
 #endif
 
   RTC_DISALLOW_COPY_AND_ASSIGN(TaskQueue);
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_RTC_BASE_TASK_QUEUE_H_